Term (years), Coupon, Yield-to-maturity (nominalannual rate converted semi- annually), Price
0.5, 0%, 8.1%, $96.11
1, 0%, 8.4%, $92.10
1.5, 9%, 8.6%, $100.55
2, 10%, 9.0%, $101.79
Coupons are paid semi-annually. Determine the spot rate for the 1.5-year period, expressed as a nominal rate compounded semi-annually.