please make sure the answers are written in a way that is easy to understand , thank you

Hector.sompany has compiled the following financial data: Source of Capital Long-term debt Preferred stock Common stock equity Book Value $10,000,000 1,000,000 9,000,000 $20,000,000 Market Value $8,500,000 1,500,000 15,000,000 $25,000,000 Cost 5.0% 14.0 20.0 (a) Calculate the weighted average cost of capital using book value weights. (b) Calculate the weighted average cost of capital using market value weights