Please help this is the most confusing one for me thank you again

Crimson Incorporated's 10 year bonds have a YTM of 8.75% and a coupon rate of 9.5%. At the time of purchase of these bonds, they have 6.0 years left to maturity. You hold the bonds for 3 years and sell them, and at this time, interest rates have increased by 50 basis points. What is the holding period return for Crimson bonds? Show all work to receive full credit