Gilligan just turned 18 and is about to start college at DePaul. His parents started saving for his college three years ago, on his 15th birthday. They put $6,000 into his college account on his 15th birthday, $11,000 on his 16th birthday, nothing (i.e. $0) on his 17th birthday and $4,000 on his 18th birthday (and today is his 18th birthday). If the money was all invested at a rate of 7%,

how much is now in Gilligan’s college account?