FIN question

{#1} Mortgage. (Hint: P/Y=12) What is the payoff on a 30 year, 7% 
A) $550,552 with a payment of 3,744.50 with 12 years remaining?
B) b. $190788 with a payment of 1,143.87 with 15 years remaining?

{#2} Stock. What is the required rate of return on a stock with a
a. $0.75 expected dividend and a 34 price with 7% growth?
b. $1.25 expected dividend and a 15 price with 8% growth?