I need help with part C. How do i work this out on a calculator? Please show work!

1. Consider an investment that has the following projected Cash Flows: CFO = -445.000, CF1 = $44,000; CF2 = $45,000; CF3 = $46,000; CF4 = $47,000; CFS through CF12 = 48,000 each; CF13 = $500,000 a. What is the IRR of this investment (round to the 4th decimal place past the percent)? b. What is the NPV if your required rate of return is 14.625%?(round to cents) C. What is the value of CF1 through CF13 if your required rate of return is 15.125%? (cents)