What are the formulas to calculate the three approaches $($CAPM$,$ DCF$,$ bond$-$yield$-$plus$-$risk$-$premium$)$ to estimate the component cost of common equity for the firm. Please show me the formulas and also show them written out in Excel or with math mode because I can't understand when it's just typed out it confuses me$.$ Free to use hypothetical numbers for an example, I just need to understand where to find the information that is needed to calculate the formula, and then to know what that formula is$.$