Annuity Immediate Accumulated Value
Since we are on a quarterly compounding versus an annual interest rate, our interest rate is 2.5% per quarter. 10/4 = 2.5.
For question b, we want to roll up that balance for 30 years at 12% per year compounded monthly.
Go here: Balance Roll with Interest
Your starting balance is question a. Interest rate is 12, and make your dates a 30 year span. I did 1/1/2008 to 1/1/2038. I got an answer of 1,959,821.66 using monthly compounding which is what your problem gives. This is just the 1% rate for 360 months as you see in the math. Let me know if you have questions.