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JavaScript

function nextPerson ( r ) {

	var names = ["Kurt", "Dave", "Kris", "Pat", "Steve"];


	if ( r % 10 === 1 || r % 10 === 2 ) {

		res = names[0]

		return res

	}

	else if ( r % 10 === 3 || r % 10 === 4 ) {

		res = names[1]

		return res

	}

	else if ( r % 10 === 5 || r % 10 === 6 ) {

		res = names[2]

		return res

	}
	
	else if ( r % 10 === 7 || r % 10 === 8 ) {

		res = names[3]

		return res

	}

	else if ( r % 10 === 9 || r % 10 === 0 ) {

		res = names[4]

		return res

	}


}
 
alert ( nextPerson ( 17 ) )