Collector Corp. is currently involved in its annual review of the firms cost of capital. Historically, the firm has relied on the CAPM to estimate its cost of equity capital. The firm estimates that its equity beta is 1.25, and the yield to maturity on long-term US Treasury bonds is 4.28%. The firms CFO is currently in a debate with one of the firms advisers at its investment bank about the level of the market risk premium. Historically, Collector has used 7% to approximate the market risk premium. However, the investment banker argues that this premium has shrunk dramatically in recent years and is more likely to be in the 3% to 4% range. a. Estimate Collectors cost of equity capital using a market risk premium of 3.5% and 7% respectively. b. Collectors capital structure is comprised of 70% equity (based on current market prices) and 30% debt on which the firm pays a yield of 5.125% before taxes at 25%. What is the firms WACC using both a 3.5% and 7% market risk premium?