A couple will retire in $40$ years; they plan to spend about $$37,000$ a year $($in current dollars$)$ in retirement, which should last about $20$ years. They believe that they can earn a real interest rate of $7\%$ on retirement savings.

a$)$If they make annual payments into a savings plan, how much will they need to save each year? Assume the first payment comes in $1$ year.

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.

b$)$How would the answer to part $($a$)$ change if the couple also realize that in $15$ years they will need to spend $$67,000$ on their child$$s college education?

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.