Homer and Marge jointly buy the half pepperoni-half mushroom pizza shown in Figure 3-25(a) for $18. Suppose that Homer values pepperoni pizza four times as much as he value mushroom pizza. Find the dollar value to Homer of each of the following pieces of pizza

a) the mushroom half of the pizza
b) the pepperoni half of the pizza
c) the slice of mushroom pizza shown in Figure 3-25(b)
d) the slice of pepperoni pizza shown in Figure 3-25(c)
e) the half pepperoni half mushroom slice shown in Figure 3-25(d)