// Write a program that can be used to calculate the federal tax. The tax calculated as follows:// For single people, the standard exemption is $4000; for married people, the standard exemption// is $7000. A person can also put up to 6% of his or her gross standard income in a pension plan. // The tax rates are as follows: If the taxable income is // 1) Between $0 and $15000, the tax rate is 15%// 2)between $15001 and $40000, the tax is $2250 plus 25% of the taxable income over $15000// 3)Over $40,000, the tax is $8460 plus 35% of the taxable income over $40000// Prompt the user to enter the following information:// 4)Martial status// 5)If the marital status is "married", ask for the number of children under the age of 14// 6)Gross salary(if the martial status is "married" and both spouses have income, enter the combined salary.)// 7) Percentage of gross income contributed to a pension fund.//The program must consist of at least the following functions://a) function getData: this function asks the user to enter the relevant data.//b) function taxAmount: this function computes and returns the tax owned.//To calculate the taxable income, subtract the sum of the standard exemption, the amount contributed //to a pension plan, and the personal exemption, which is $1500 per person.#include <iostream>#include <string>#include <iomanip>using namespace std;void getData(char marital, int numChild, int& exempt, int& noOfPeople, double& groSalary, double& penAmt);double taxAmount(double taxIncome, int perExempt, double taxRate);int main(){ double groSalary; //variable for gross salary double penAmt; //variable for percent contributed to pension plan int exempt; //variable for standard exemption int noOfPeople; //variable for number of people double taxIncome; //variable for taxable income double taxRate; //variable for federal tax amount owed getData(char marital, int numChild, int& exempt, int& noOfPeople, double& groSalary, double& penAmt); double taxAmount(double, int, double); cout << "Your federal tax owed is: " << taxRate << endl; return 0;} void getData(char marital, int numChild, int& exempt, int& noOfPeople, double& groSalary, double& penAmt){ char marital; //variable for marital status int numChild; //variable for the number of children under 14 cout << fixed << showpoint; cout << setprecision(2); cout << "Enter your marital status: 'M' for Married or 'S' for Single: "; cin >> marital; cout << endl; if (marital == 'M' || marital == 'm') { cout << "Enter number of children under the age of 14 years: "; cout <<endl; cin >> numChild; exempt = 7000; noOfPeople = 2 + numChild; } else if (marital == 'S' || marital == 's') { exempt = 4000; numChild = 0; noOfPeople = 1; } cout << "Enter gross salary. (Enter combined salary for both spouses"; cout << "if married): "; cout << endl; cin >> groSalary; cout << "Enter the percentage of your gross income which you have"; cout << " contributed to a pension fund (Only enter the amount if 6%"; cout << " or less of your combined gross income: "; cout << endl; cin >> penAmt; if (penAmt > 6) { cout << "You may only enter a percentage which is greater or equal"; cout << " to 6. Enter the percentage of your gross income which you have"; cout << " contributed to a pension fund. (Only enter the amount if 6%"; cout << " or less of your combined gross income: "; cout << endl; cin >> penAmt; }} double taxAmount(double taxRate, int perExempt, int noOfPeople, double taxRate){ double taxRate; //variable to store taxRate double taxAmt; //variable to store total tax amount int perExempt //variable for personal Exemptions taxRate = 0; perExempt = (noOfPeople * 1500) + exempt; taxIncome = groSalary - (groSalary * (penAmt * .01)) - perExempt); if (taxIncome <= 15000) {taxRate = .15 * taxIncome; } else if (taxIncome > 15000 && taxIncome <= 40000) {taxRate = ((taxIncome - 15000) * .25) + 2250;} else{ taxRate = ((taxIncome - 40000) * .35) + 8460; } return taxRate;}