please solve without using excel

3. A couple wants to save for their 4-year old son's college expenses. Assuming that the child enters college at age 18. The couple estimates that an amount of $45,000 will be required to support the first year of the child's college expenses. College expenses are due at the beginning of each year and estimated to increase at an annual rate of 3% during the son's next 4 years of college. Assuming that the saving account will average 12% compounded quarterly. a. How much money they need have in the saving account when the child reaches 18? b. The couple wishes to start with a deposit at the end of the first quarter and increases it at a rate of $50 each quarter thereafter until they send their child to college. Determine the value of the first deposit