Can someone solve this for me and a couple more questions ?

Can someone pls ! pls answer all. no explanation needed..

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°