Can you show your work and how you got your answer? thanks

An annuity pays quarterly for 16 years at the beginning of each quarter. Payments during the first year are 250/quarter. Year 2 payments are each 105. The payments go up by 150 for each subsequent year but are level within each year. AEIR = 5%, please find the accumulated value of this annuity just prior to the payment at t=15. An annuity pays quarterly for 16 years at the beginning of each quarter. Payments during the first year are 250/quarter. Year 2 payments are each 105. The payments go up by 150 for each subsequent year but are level within each year. AEIR = 5%, please find the accumulated value of this annuity just prior to the payment at t=15