Can someone help me with my finance quiz. I got a 1/10 and need some help with some other questions

Prompt: Today is 1 July 2021. You are looking to purchase an investment property today (after months of research and negotiations). You have spoken to Peter, the loan specialist at Harrison Bank, to negotiate the terms of your mortgage. You and Peter have agreed to the following terms:

• You will borrow $720,000 today in order to purchase your chosen property.
• This mortgage will be repaid by level monthly repayments.
• Your first repayment to the bank will occur exactly 1 month from today, on 1 August 2021, and the final repayment will occur exactly 27 years from today, on 1 July 2048.
• Peter has arranged for an interest rate of 7.2% p.a. effective to be locked in for the life of this loan.

Q1. Calculate the size of the level monthly repayment needed in order to fully repay the loan by 1 July 2048. Give your answer to the nearest cent, and do NOT include a dollar sign.

Q2. (Multiple Choice)

In preparation of your tax return, you need to calculate the interest charged on your loan so that you can claim it as a tax deduction. Specifically, you are interested in the financial year ending 30 June 2022.

For the purposes of this question, pretend that the repayment on 1 July 2022 is occurring on 30 June 2022 so that there are 12 repayments made in this financial year. Further, the subscripts used for loan outstanding are measured in months, e.g. L240L240 is the loan outstanding after 240 months/20 years.

In order to calculate the interest charged on the loan from 1 July 2021 to 30 June 2022, which value(s) of loan outstanding are needed?

a) L₀ only

b) L₀, L₁ and L1₂

c) L₁₂ only

d) L₀ and L₁₂

Q3. Determine the value of L12L12.