Your grandfather put some money in an account for you on the day you were born. You are now $20$ years old and are allowed to withdraw the money for the first time. The account currently has $$$$28$ comma $939$ in it and pays an $12\%$ interest rate. a$.$ How much money would be in the account if you left the money there until your $30$th $$birthday$?$ b$.$ What if you left the money until your $60$th $$birthday$?$ c$.$ How much money did your grandfather originally put in the$$ account? Question content area bottom Part $1$ a$.$ How much money would be in the account if you left the money there until your $30$th $$birthday$?$ If you left the money there until your $30$th $$birthday$,$ the amount in the account would be $$$ $$ enter your response here. $($Round to the nearest$$ cent.$)$ Part $2$ b$.$ What if you left the money until your $60$th $$birthday$?$ If you left the money there until your $60$th $$birthday$,$ the amount in the account would be $$$ $$ enter your response here. $($Round to the nearest$$ cent.$)$ Part $3$ c$.$ How much money did your grandfather originally put into the$$ account? The amount of money your grandfather originally put into the account was $$$ $$ enter your response here. $($Round to the nearest$$ cent.$)$