Engineering Economics problem

Kindly solve correctly and pls dont use excel. Thanks a lot.

1. (30 points). For the cash flows given in the Table below, convert it to an equivalent uniform series over periods (every 2 months) 1 through 5. With an interest rate of 20% compounded quarterly.

We are told not to use irregular cash flow series to solve, otherwise no point will be given.

Every 2 months	0	1	2	3	4	5	6	7	8
Cash flow	0	0	0	0	400	400	800	1200	1600

2. (25 points). For the cash flow profile and interest rates given in the table below (This is about Variable Interest Rates)

Year	0	1	2	3	4
Cash flow $	-1000	-1500	2500	0	4000
Interest Rate/year	N/A	4%	5%	5%	3%

a.Determine the value of the cash flow profile at year 0

b. Find the equivalent uniform series from year 3 to 4

Thanks for your help