Answer and Explanation:
The computation is shown below;
a. the net present value is
Year cash flow factor at 10% Discounted cash flows
0 -$56,000 1 $56,000
1 $23,000 0.9091 $20,909.09
2 $23,000 0.8264 $19,008.26
3 $25,000 0.7513 $18,782.87
4 $28,000 0.6830 $19,124.38
5 $16,000 0.6209 $9,934
Net present value $31,759.34
b. The internal rate of return is
Here we apply the formula
= IRR()
After this, the irr is 30.75%