Step by step solution would be grateful part a and b thanks

Question 1 A businessman is considering the purchase of an investment The initial outlay is 60,000 and a further payment of 30,000 is required at time 1%. The investment will produce a continuous cash inflow at a rate of 3,000 p.a. in the first three years, E6,000 p.a. in the next three years and so on, increasing by 3,000 p.a. every three years until the end of year 18. At the end of year 18, the investment will be sold for 20,000. Calculate the NPV of the investment using a rate of interest of 8% pa. effective. Estimate the annual IRR on this investment to the nearest 0.1%. a) b) ( a) 1,504.1 b) 8.2% )