Which of the following assignment statements correctly specifies the MEAN function that has the arguments Rest1, Rest2, Rest3, and Rest4?

	RestAvg=mean of rest1-rest4;
	RestAvg=mean(rest1 rest2 rest3 rest4);
	RestAvg=mean'rest1,rest2,rest3,rest4';
	RestAvg=mean(rest1,rest2,rest3,rest4);