please provide excel solution

Question 11 10 pts (11) a) Calculate the future value at time 60 of a series that has 60 monthly payments of $200, with the exception that payment 28 will be skipped (in other words, the $200 will not be paid) and there will be an additional payment of $2500 at time 15. All times are in months and the nominal rate is 15%. b) Given the figure you obtained in part A, calculate the equivalent value at time 40. O $15,820 and $13,230, respectively $19200 and $18302, respectively $21,790 and $16,996, respectively 0 20,003 and 10,001, respectively