anyone please help and explain

A rm has the current liabilities and equity nancing on its balance sheet shown below. The rm has taxable income that puts it in a 35% federal tax bracket. Source of Fund Amount Rate of Return Short-term loan $6,000,000 7.5% Long-term loan $21,000,000 4.5% Retained Earnings $35,000,000 17 0% Common stock $38,000,000 22.0% a. Compute the after-tax rm's weighted average cost of capital (WACC)