Question

A child's wading pool is to be built in the shape of a circle with a tiled walkway around it as the pictured below. the pool will have a diameter of 6 feet, and the walkway is 1 1/2 feet wide. how many square feet of space is required to build the structure.
A: pi(4 1/2)^2
B:pi[3^2-(1 1/2)^2]
C:pi[3^2+(1 1/2)^2]
D:pi 3^2
E:pi(11/2)^2