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function medeltal(tal1, tal2, tal3, tal4){	var svar = tal1 + tal2 + tal3 + tal4 / 4;	return(svar);}                tal1 = parseInt(prompt("Ange tal: "));		tal2 = parseInt(prompt("Ange tal: "));		tal3 = parseInt(prompt("Ange tal: "));		tal4 = parseInt(prompt("Ange tal: "));			medeltal(tal1, tal2, tal3, tal4);		document.write(svar);