The Table Below Gives Data on Output for a Firm

The table below gives data on output for a firm in the short run.The firm is able to hire labor and its TPP is given.Compute the APP, MPP, and MRP for labor if the price of the good is fixed at $12 per unit.
$\begin{array} { c c } \underline {\text { LABOR }} & \underline {\text { TPP }}& \underline {\text { APP }}& \underline { \text { MPP } }& \underline { \text { MRP } } \\1 & 4& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\2 & 9& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\3 & 15& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\4 & 21& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\5 & 26& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\6 & 30& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\7 & 33& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\8 & 35& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\9 & 36& \underline {\quad\quad\quad}& \underline {\quad\quad\quad}& \underline {\quad\quad\quad} \\\end{array}$