The present value of an annuity is given by

where: PV is the current value of the annuity, P is the periodic payment, r is the apr, t is the number of compounding in one year and n is the number of years.
Thus, given that PV = $51,800; r = 7.8% = 0.078; t = 12; n = 4.

Therefore, the <span>monthly payment is $1,259.73</span>
I got 5:3 and 8:15 Try at least the 5:3 because I got right
Found this when I was doing my own work, hope this helps.
Answer:
I dont know if I can answer if I don't have more information then the question