You have $3$ kids $10,11,12.$ They will go college when $18-21.$ The tuition is $20000$ per year. EAR is $6\%.$ The oldest need pay $6$ years later and end $9$ years.

$1,$ What is PV of tuition of all kids.

$2,$ If you have $100000$ in your deposit account, EAR is $6\%.$

You will make deposite for $3$ years. The first deposite one year from now.

How much you need pay each year to cover tuition? $($Calculate C$)$