(a) Mr. Talukder retired very recently receiving 70% lump sum of his total retirement payment of 5 Million taka of which 60% he invested in a bank against the following cash-inflows: wwwwwwwww Year-End 1 2-5 Amount 165000 200000 6-9 10 350000 450000 Use a known method to identify if he made the right decision or not. Also, compute his total profit/loss for this investment. (b) Mr. X is about to be a Billionaire receive a payment of $1B for the investment he made 20 years ago with 198 APR compounding semi-weekly. Compute the big investment he made all these years ago