Answer:
b. IRR decreases
Step-by-step explanation:
Internal rate of return is the discount rate that equates the after tax cash flows from an investment to the amount invested.
IRR can be calculated using a financial calculator:
IRR when payment at the end of the first two years is $100
Cash flow in year 0 = -$1,000
Cash flow in year 1 = $100
Cash flow in year 2 = $100 +$2000=$2100
IRR = 50%
IRR when payment at the end of the first two years is $50
Cash flow in year 0 = -$1,000
Cash flow in year 1 = $50
Cash flow in year 2 = $50 +$2000=$2050
IRR = 45.70%
From the calculation, one can see that the IRR when cash flow at the end of the first two years was $100 is higher.
I hope my answer helps you