Jenny borrowed $1,974.92 at an interest rate of 2.6% compounded quarterly, and the interest changed after 1.5 years to 1.5% compounded semiannually. On the first anniversary of the loan she made a payment of $949. What payment made on the second year will extinguish the debt?

What is the nominal annual rate of interest compounded quarterly at which $4,241.42 will accumulate to $5,702.94 in 4 years and 2 months?

Compute the nominal annual rate compounded semi-annually that is equivalent to a nominal rate of 5.7% p.a. compounded quarterly.