Given:
principal 15,000
term 9 years
rate 8.5%
Interest = Principal * Interest Rate * Term
I = 15,000 * 8.5% * 9
I = 11,475
Total = 15,000 + 11,475 = 26,475 on date of maturity
Interest = 15,000 * 8.5% * 2
I = 2,550
Total = 15,000 + 2,550 = 17,550
amount withdrawn = 4,000
Penalty = 4,000 * 8.5 % * 6/12
P = 170
Net amount = 17,550 - 4,000 - 170 = 13,380
I = 13,380 * 8.5% * (8-2)
I = 6,823.80
Total = 13,380 + 6,823.80 = 20,203.80 total amount on maturity.