Hi, can you please help with understanding this:

Gerald has taken out a loan of$100,000 today to start a business. He has agreed to repay the loan on the following terms:

• Repayments will be made on a monthly basis. The first repayment will be made exactly one month from today.
• The repayments for the first 5 years will cover interest only to help reduce the financial burden for Gerald's business at the start.
• After the 5-year interest-only period, Gerald will make level monthly payments that will fully repay the loan after an additional 15 years (i.e. 20 years from today, the loan will be fully repaid).
• The interest charged is 5% p.a. effective.
• Using this information, answer the following questions.

a)Calculate the equivalent effective monthly rate on the loan

b)Calculate the size of the first repayment due exactly one month from now.

c) Calculate the size of the level repayments that occur after the initial 5-year interest-only period