Calculate the annual internal rates of return (IRR) for the following investments (time t is in years):
a. At t = 0 the cost is $100. The cash flows are $100 at t = 1 and $250 at t = 3.
b. At t = 0 the cost is $150. The cash flows are $100 at t = 1 and $250 at t = 3.
c. At t = 0 the cost is $100. The cash flows are $100 at t = 1 and $250 at t = 2.
d. At t = 0 the cost is $100. The cash flows are $250 at t = 1 and $100 at t = 3.
Which of these investments has the highest IRR? Why?
Can someone show me how to calculate these please?