Answer:
the weighted average cost of capital is 6.31 %
Explanation:
Weighted Average Cost of Capital (WACC) is the return required by the providers of long term permanent source of capital to the firm.
WACC = Ke × (E/V) + Kp × (P/V) + Kd × (D/V)
Ke = Cost of equity
  = $1.20 / $37.00 + 0.04
  = 0.0724 or 7.24 %
E/V = Weight of Equity
   = (200,000 × $37) ÷ (200,000 × $37 + 4,500 × $1,000 × 99%)
   = $7,400,000 ÷ ($7,400,000 + $4,455,000)
   = 62.42 %
Kd = Cost of Debt
  = Interest × (1 - tax rate)
  = 6.70 % × (1 - 0.34)
  = 4.42 %
D/V = Weight of Debt
   = (4,500 × $1,000 × 99%) ÷ (200,000 × $37 + 4,500 × $1,000 × 99%)
   = $4,455,000 ÷ ($7,400,000 + $4,455,000)
   = 37.28 %
Therefore,
WACC = 7.24 % × 62.42 % +  4.42 % × 37.28 %
      = 6.31 %