Sabah Company has $900,000 to invest and wishes to evaluate the following three projects. Years X ($) Y($) Z ($) 0 (420,000) (450,000) (450,000) 1 150,000 270,000 300,000 2 150,000 60,000 130,000 3 150,000 120,000 150,000 4 150,000 180,000 cost of capital 12% 12% 12% Required: Which project(s) would you recommend using: a. Payback Period (PP) in nominal and discounted values. b. Net Present Value (NPV) c. Profitability Index (PI) d. The internal rate of return (IRR) (hint: use 30% for X and Y, and 5% for Z