You are considering estimating Weighted Average Cost of Capital $($WACC$)$ for Company X$.$ Below is the information that you have retrieved from the different data sources:

Current Price $$40\mathrm{.}00$

Estimated Growth Rate $7\mathrm{.}00\%$

Beta $0\mathrm{.}89$

Number of Shares Outstanding $4,250,000,000$

Next Year's Expected Dividend $$1\mathrm{.}60$

$5-$Year Treasury Yield $2\mathrm{.}50\%$

Tax Rate $21\mathrm{.}0\%$

Expected Market Risk Premium $5\mathrm{.}50\%$

Also, you have retrieved the company's bonds information from FINRA website as follows:

Name Maturity Par Value $($Amount Outstanding$)$ Price YTM

X $7\mathrm{.}375\%7/29/209395,835,000140\mathrm{.}118\%5\mathrm{.}231\%$

X $3\mathrm{.}150\%11/15/20201,000,000,000100\mathrm{.}442\%2\mathrm{.}925\%$

X $3\mathrm{.}300\%9/1/20211,324,080,000100\mathrm{.}448\%3\mathrm{.}133\%$

X $2\mathrm{.}500\%4/1/2023750,000,00096\mathrm{.}558\%3\mathrm{.}342\%$

X $2\mathrm{.}450\%11/1/20201,250,000,00098\mathrm{.}851\%3\mathrm{.}045\%$

X $3\mathrm{.}200\%11/1/20231,500,000,00098\mathrm{.}928\%3\mathrm{.}435\%$

X $1\mathrm{.}875\%10/27/20201,500,000,00097\mathrm{.}841\%2\mathrm{.}998\%$

X $2\mathrm{.}875\%10/27/20251,750,000,00095\mathrm{.}028\%3\mathrm{.}688\%$

X $2\mathrm{.}550\%6/1/2026500,000,00091\mathrm{.}903\%3\mathrm{.}785\%$

X $1\mathrm{.}550\%9/1/20211,000,000,00095\mathrm{.}656\%3\mathrm{.}161\%$

X $2\mathrm{.}250\%9/1/20261,000,000,00090\mathrm{.}007\%3\mathrm{.}730\%$

X $2\mathrm{.}200\%5/25/2022500,000,00096\mathrm{.}424\%3\mathrm{.}266\%$

X $2\mathrm{.}900\%5/25/2027500,000,00093\mathrm{.}606\%3\mathrm{.}780\%$

Total Par Value of Debt: $12,669,915,000$

$1.$ Estimate the weighted average pre$-$tax cost of debt $($using market value weights$).$

$2.$ Estimate the cost of equity using CAPM.

$3.$ Estimate the cost of equity using DDM$.$

$4.$ Using the simple average of cost of equity from CAPM and DDM$,$ estimate the WACC for Company X$.$