Your parents start saving for your sisters college education. She will begin college when she turns age 18 and will need $4,000 at that time and at the end of each of the following 3 years. They will make a deposit at the end of this year in an account that pays 6% compounded annually, and an identical deposit at the end of each year with the last deposit occurring when she turns age 18. If an annual deposit of $1,484 will allow them to reach their goal, how old is your sister now? [Please start drawing a timeline, and thinking about the different dimensions of Time Value of Money to solve this problem. Hint: you may want to visualize the critical juncture of the time point of her college entering age of 18, where cashflows do meet.]