Free cash flow valuation

You are evaluating the potential purchase of a small business with no debt or preferred stock that is currently generating ​$42,500 of free cash flow ​(FCF0​= ​$42,500​). On the basis of a review of​ similar-risk investment​ opportunities, you must earn​ a(n) 18​% rate of return on the proposed purchase. Because you are relatively uncertain about future cash​ flows, you decide to estimate the​ firm’s value using several possible assumptions about the growth rate of cash flows.

What is the​ firm’s value if cash flows are expected to grow at an annual rate of​ 0% from now to​ infinity?

What is the​ firm’s value if cash flows are expected to grow at a constant annual rate of 7​% from now to​ infinity?

What is the​ firm’s value if cash flows are expected to grow at an annual rate of 12​% for the first 2​ years, followed by a constant annual rate of 7​% from year 3 to​ infinity?