Answer:
6.94%
Step-by-step explanation:
The computation of the company WACC is shown below:
= Weightage of debt × cost of debt × (1 - tax rate) + (Weightage of common stock) × (cost of common stock)
where, 
Cost of common stock is 
= Dividend ÷ Stock price + Growth rate 
= $2 ÷ 50 + 5.0% 
= 4% + 5%
= 9%
So, the company WACC is 
= (0.40 × 7%) × ( 1 - 45%) + (0.60 × 9%) 
= 1.54% + 5.4%
 = 6.94%
Hence, the company WACC is 6.94%