Can you please explain and answer how to use this given data to calculate the WACC for both of the different business segments.

MV asset weights Bond rating Pretax cost of debt Tax rate After-tax cost of debt Corporate 100% A-/BBB+ 5.88% 40% 3.53% Telecommunications Services 75% A 5.74% 40% 3.44% Products and Systems 25.00% BB 7.47% 40% 4.48% Equity beta RE RM RAR Cost of equity 1.15 4.62% 10.12% 5.50% 10.95% Weight of debt Weight of equity WACC 22.2% 77.8% 9.30%