Please solve parts A,B,C and the effective annual rate for each of those loans

Straight bank loan. Left Bank has a standing rate of 7.6% (APR) for all bank loans and requires monthly payments. What is the monthly payment if a loan is for (a) $100,000 for 4 years, (b) $270,000 for 8 years, or (c) $1,200,000 for 24 years? What is the effective annual rate of each of these loans