Marni loves pancakes and likes to eat them in a tall stack. Assume that she always makes $8$ pancakes with a thickness of $\frac { 1 } { 4 }$ inch.

1. Last Saturday, Marni decided to make square pancakes. If the largest pancake had an edge of $9$ inches and each pancake had an edge $\frac { 1 } { 4 }$ inch shorter than the one below it, find the volume of pancakes Marni ate last Saturday.

   Hint (a):

   Volume $=$ (Area of Base)(Thickness)

   More Help (a):

   The area of the base of each pancake is the edge squared.

   Answer (a):

   $132.6875$ in$^²$

2. Next Sunday, Marni will make circular pancakes. This time, each pancake will have a diameter $1$ inch smaller than the one below it and the smallest pancake will have a radius of $2$ inches. How much volume is she planning to eat?