Consider an investment project that needs costs now and at the end of year 3. The income will be started at the end of year 1 and will go to the end of year 6. The cost and income cash flows are as follows:

Year	0	1	2	3	4	5	6
Cost ($)	-100,000			-25,000
Income ($)		25,000	30,000	35,000	40,000	45,000	50,000

What is the interest rate the project offers?