Having trouble answering part 2-4, could you please provide an explanation!?!!

Quantitative Problem: You are given the following information for Wine and Cork Enterprises (WCE): IRF = 5%; r = 10%; RPM = 5%, and beta = 1 What is WCE's required rate of return? Do not round intermediate calculations. Round your answer to two decimal places. % If inflation increases by 1% but there is no change in investors' risk aversion, what is WCE's required rate of return now? Do not round intermediate calculations. Round your answer to two decimal places. % Assume now that there is no change in inflation, but risk aversion increases by 2%. What is WCE's required rate of return now? Do not round intermediate calculations. Round your answer to two decimal places. % If inflation increases by 1% and risk aversion increases by 2%, what is WCE's required rate of return now? Do not round intermediate calculations. Round your answer to two decimal places. %