Can someone help me with A and B I don’t know how to do this

Which expression converts 45 degree to radians

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?