TIME VALUE: Twins, Wanda and Pietro graduate from Sokovia University and start working at age $23.$ They each chose different financial plans with respect to retirement. However, both of their retirement plans earned the same interest rate of $9\%.$They both retired at $55.$

Wanda immediately put $$7,500$ per year into a retirement account. After $15$ years, she made no further contributions into the account and retired at $55.($The account continues to accumulate until age $55).$

Pietro did not start saving for retirement until later in life. When he was $30$ years old, he started investing $$7,500$ each year until he retired at age $55.$

$1)$ How much did each of them contribute out of pocket?$$

$2)$ What is the value of each of their retirement accounts upon retirement?$$

$3)$ Who has more and why?$$