Could I get help with this question please ?

Could I get help with this question please ? Thanks

Given the following data:

Cost of debt = rD = 0.016;

Cost of equity = rE = 0.072;

Marginal tax rate = 35%;

and the firm has 50% debt and 50% equity. Calculate the after-tax weighted average coat of capital (WACC), precise to four digits after the comma: