Command Button To Reset Values

I'd like to make a one command button for which the function on Sheet "PM Data" (when pressed) would:
1--Reset Cells (G5, G28, and G51) to a default value of "2",
2--Reset Cells (D16, D39, and D62) to a default value of "C/D"

Can anyone help me w/ the steps from beginning to end? Thanks!!!