Complete the Table Below by Computing the Missing Numbers from Those

Complete the table below by computing the missing numbers from those that are given.

$\begin{array} { l c c c c } Q & \text { Fixed Costs } & \text { Variable Costs } & \text { Average Cost } & \text { Marginal Cost } \\0 & \$ 20 & & & \\1 & --- & ---& --- & \$ 8 \\2 & --- & 15 & --- & ---\\3 & --- & --- & 13.67 & --- \\4 & --- & --- & ---& 6 \\5 & --- & --- & --- & 7 \\6 & --- & 42 & ---& --- \\7 & ---& 51 & --- & --- \\8 & --- & --- & 10.125 & ---\end{array}$