please help wirj these! i just dont understand how to solve!

Net Present Value A project has estimated annual net cash flows of $11,250 for seven years and is estimated to cost $45,000, Assume a minimum acceptable rate of retum of 10%. Use the Present Value of an Annuity of $1 at Compound Interest table below. Present Value of an Annuity of $1 at Compound Interest Determine (a) the net present value of the project and (b) the present value index, If required, use the minus sign to indicate a negative net present value. Net present value of the project (round to the nearest dollar) Present value index (rounded to two decimal places) Internal Rate of Retum A project is estimated to cost $87,178 and provide annual net cash flows of $26,000 for five years. Present Value of an Annuity of $1 at Compound Interest Determine the internal rate of return for this project, using the Present Value of an Annuity of $1 at Compound Interest table shown above. %