8. Four proposals (A, B, C, and D) are available for investment. Proposals A and C cannot both be accepted; Proposal B is contingent upon the acceptance of either Proposal C or D; and Proposal A is contingent on D.

a. List all possible combinations of proposals and clearly show which are feasible.

b. Of the ten principles, which one(s) is well illustrated by this problem?

c. Of the systematic economic analysis technique’s seven steps, which one(s)
is well illustrated by this problem?