please help 4 and 5

1.) John plans to deposit 55,000 (right now) and $5,000 at the end of month 7 into an account that pays interest at 12%/year, compounded semiannually. If he withdraws $1000 in month 2. 11, and 23. What the total value of the account at the end of year 2. Solution: -$5,000(F/P, 6%, S)-S5,000(F/P, 6%, 2)+S1000(F/P, 6%, 4)+S1000(F/P,6%, 3)+$1000(F/P, 6%, 1- 2.) The maintenance costs are expected to be $1,000 for the second year, $2,000 for the third year. and $3000 for the fourth year and that, if interest is 15% per year, it is desired to find: a) the present equivalent value at the beginning of the first year b) the uniform annual equivalent value at the end of the four years. a. P-51,000(P/G, 15%,4)-$1,000(3.786)= b. A-$1,000(A/G, 10%,4) 3.) A company wants to know the equivalent future worth of $10,000 capital investment each year for 8 years, starting 1 year from now. Assume -14%/year. F-$10,000(F/A, 14%, 8) 4.) A company purchased a machine for $5,000 and paid annual maintenance cost of $500 per year for 6 years starting 4 years from now. What is the present worth in year of the payments if the interest rate is 8%/year? P-$5,000+$500 (P/A, 8%, 6/P/F, 8%, 3)I 5.) A company paid 5500 maintenance cost every 6 months for the past 7 years for a piece of equipment. What is the equivalent total amount after the last payment, if these payments are taken from a pool that has 8%/year, compounded quarterly? (1+4%272-4.04% F-5500(F/A. 4.04%, 14) Die