Answer and Explanation:
The computation is shown below:
Profit margin = Return on assets ÷ (Sales to total assets)
= 4% ÷ 1.6 
 = 2.50% 
 Liabilities-to-assets ratio = 1 - ROA ÷ ROE 
 = 1- 4 ÷ 5 
 = 20.00%
 Debt-to-assets ratio = Haslam's liabilities-to-assets ratio × 50% 
 = 20% × 50%
= 10.00%