An industrial firm can purchase a special machine for $22,000. A down payment of $2, 500 is required, and the balance ca be paid in 5 equal year end installments at 14% interest on the unpaid balance. As an alternative the machine can be purchased for $19,000 in cash. If the firm's MARR is 20%, determine which alternative should be accepted. Use the present worth on incremental investment approach. b) A company is considering Proposals P1, P2, and P3, one of which must be adopted. Proposal P1 is contingent on Proposal P2, and Proposals P2 and P3 are mutually exclusive. i) List all mutually exclusive investment alternatives. ii) Designate alternatives feasible or infeasible, giving reasons for infeasibility