Construct a cash flow timeline with n=10 years. Include a Year 0 cost of P0, at least two future costs in two different years (F1 and F2), a series of 5 annual costs (A) that start in a year that you select, and a single income in year 10 from salvage (S). Now you have a timeline and economic model but no dollar cost estimates. Using your cash flows above, build two different factor equations that can be used to compute the overall Present Value (P) using the timeline cash flows from your timeline. Let the interest rate be a variable named i%. Use the cost variables name to represent the cash flow dollars and write each equation to produce an overall model for Present Value at time 0. That is, Poverall = ??