hand written please with explanation

Problem 1. Calculate the interest on a $1,325 credit card balance showing 18.25% APR assuming that $325 is sent on March 10th and is recorded on March 20th. Use the following method for calculating the interest. (a) previous balance method (b) adjusted balance method (c) average daily balance method Problem 2. A newspaper advertisement offers a $4,000 used car with $250 down and 36 easy monthly payments of $116.62. Find (a) Amount to be paid (b) Amount of interest (c) Interest rate,r,rounded to the nearest hundredth of a percent. (d) APR, rounded to the nearest tenth of a percent