please help me answer the all of the question

Nat Finsest valle Mothoid - Assuty 170.000. The bullister uses fie that is expected to cost 447 per hour of buldoter ogeration. a. Dutermine the soual estual nut cask fows from oprosting the buldorer. meerest deliar, Ir required, use the minue sign to indicate a negative net present value. c. Strould Janes invest in the buldozec, besad on this anelvsis?. bechule the buelldorer cost is the present valuen of tha cabl flews at the minimatr desined rate ef return of 254 . seatiat whole namhet haur