Please show simplest way to solve and show work [ multi part question ] if very needed use excel.

Which of the following will INCREASE the present value of an annuity, other things equal ? a.) increasing the the interest rate b.) decreasing the interest rate c.) decrease the number of payments d.) decrease the amount of the payment

Penny has been awarded two annuities over the next 12 years. She will receive an annual payment of $500 for the first five years. She will then receive an annual payment of $650 for the next seven years thereafter. With a discount rate of 7.50% , what is the combined present value of the annuities? a.) $4,421.04 b.) $6,116.30 c.) $5,839.12 d.) $5,285.76 e.) $4,656.99

How much will accumulate in an account with an initial deposit of $133, and which earns 9% interest compounded quarterly for 4 years? a.) $212.36 b.) $133.10 c.) $134.49 d.) $313.84 e.) $189.87

You have an investment account that pays you 7.25% compounded monthly. You opened the account with $750. The account is now worth $1,125. How long did it take for this increase in value to occur? Years and days? a.) $4,421.04 b.) $6,116.30 c.) $5,839.12 d.) $5,285.76 e.) $4,656.99