I can't find the solutions of this question please help.

-1) On January 1, Pete Rowe bought a ski chalet for $57,500. Pete is renting the chalet for $68 per night. He estimates he can rent the chalet for 180 nights. Pete's mortgage for principal and interest is $461 per month. Real estate tax on the chalet is $630 per year. Pete estimates that his heating bill will run $70 per month. He expects his monthly electrical bill to be $15 per month. He pays $11 per month for cable television.

a.What is Pete's return on the initial investment for this year?(Round your answerto the nearest tenth percent.)

Pete's return%

b.Assume rentals drop by 25% and monthly bills for heat and electricity drop by 15% each month. What would be Pete's return on initial investment?(Round your answerto the nearest tenth percent.)

Pete's return%