Answer
The solution is shown in the adjacent figure.
Work Step by Step
$Marginal\ Product$ = $\frac{Change \ in\ total\ product}{Change\ in\ labor\ input}$
Example of calculation at inputs of labor = 3
$Marginal\ Product$ = $\frac{51 - 34} {3 - 2}$ = 17
$Average\ Product$ = $\frac{total\ product}{ labor\ input}$
Example of calculation at inputs of labor = 3
$Average\ Product$ = $\frac{51}{ 3}$ = 17
