please help!

a. What is the net present value of the project? (Negative amount should be indicated by a minus sign. Round your present value factor to 3 decimals and round all other intermediate calculations to nearest whole dollar.) c. The internal rate of return is between what two whole discount rates (e.g. between 10% and 11%, between 11% and 12%, between 12% and 13%, between 13% and 14%, etc)? d. Reset the discount rate to 12%. Suppose the salvage value is uncertain. How large would the salvage value have to be to result in a positive net present value