I know the answer but I do not know how to work the problem. Please show me the equation and step by step how to work the problem. NOT ON EXCEL. We can not use excel to solve our problems.

Your firm is considering an investment that will cost $920,000 today. The investment will produce cash flows of $450,000 in year 1, $270,000 in years 2 through 4, and $200,000 in year 5. The discount rate that your firm uses for projects of this type is 11.25%. What is the investment's internal rate of return?

Selected Answer:	20.53%
Answers:	27.28%
	21.26%
	20.53%
	15.98%