Q2: please help me this case. this is urgent!! thank you

b) A survey of banks estimated the following probabilities for the interest rate being charged on a equity loan based on a 30-year loan, based on past records. Interest Rate 6.0% 6.5% 7.0% 7.5% >7.5% Probability 0.20 0.23 0.25 0.28 .04 i What is the most common interest rate and why? ii What approach was used in estimating the probabilities for the interest rates