Need help with a math questions

Question

Loan of $5400 interest is compounded monthly for 72 months and the final amount of the loan is $ 6965.35.

Answer 1

A=P(1+r/n)^nt

6965.35 = 5400(1+r/12)^12(72/12)

solve for r = annual interst rate

6965.35/5400 = (1+r/12)^72

(6965.35/5400)^(1/72)= 1+r/12

r = 12(6965.34/5400)^(1/72) -12

r= about 4.25%