7. The future worth of a project with initial cost P, a negative annual cash flows of A, a salvage value of S, an interest rate of i over a life of N years can be calculated using: (a) FW = -P(F/P, 1%, n) + A(F/A, 1%, n) + S(F/P, 1%, n) (b) FW = P(F/P, 1%, n) - A(F/A, 1%, n) +S (c) FW =-P(F/P, 1%, n) -A(F/P, 1%, n) + S (d) FW = -P(P/F, 1%, n) + A(F/A, 1%, n)-A (P/A, 1%, n)) + Si = -P(F/P, 1%, n) + A(F/A, 1%, n) + S (e) FW