Consider the project balances in the table below for a typical investment project with a service life of four years.( show formulas please)

(a) Determine the interest rate used in computing the project balances.

(b) Construct the original cash flows of the project.

n	An	Project Balance
0	($9,000)	($9,000)
1	-	-7,500
2	-	-6,500
3	1,910	-5,500
4	-	0