= Jeff deposits 60 into a fund at t = 0, and deposits another 30 at t = 20. Interest is credited at a nominal discount rate of d compounded quarterly for the first 16 years, and at a nominal interest rate of 7% semiannually thereafter. The accumulated balance at the end of 34 years is 650. Calculate d. [1.a(vi-ix) #02] 0 6.45% 5.82% 5.98% O 6.3% O 6.14%