In the economy of Mungo, discussed in your workbook, there is a third person called Ike. Ike has a red income of 92 rcus and a blue income of 20 bcus. (Recall that red prices are 2 rcus [red currency units] per unit of ambrosia and 6 rcus per unit of bubble gum. Blue prices are 1 bcu [blue currency unit] per unit of ambrosia and 1 bcu per unit of bubble gum. You have to pay twice for what you buy, once in red currency and once in blue currency.) If Ike spends all of his blue income but not all of his red income, then he consumes

a. at least 13 units of bubble gum.

b. at least 7 units of ambrosia.

c. exactly twice as much bubble gum as ambrosia.

d. at least 17 units of bubble gum.

e. equal amounts of ambrosia and bubble gum.