a. Compute the missing amounts and show the balance sheet at Year-ends 1, 2,3, and 4. Show your computations. b. What transactions might explain the change in total assets between Years 1 and 2? c. What transactions might explain the change in retained earnings between Years 2 and 3 ? d. What transactions might explain the change in total liabilities plus owners' equity between Years 3 and 4 ? 3. Balance sheet changes. Below are incomplete balance. a. Compute the missing amounts and show the balance sheet at Year-ends 1, 2,3, and 4. Show your computations. b. What transactions might explain the change in total assets between Years 1 and 2? c. What transactions might explain the change in retained earnings between Years 2 and 3 ? d. What transactions might explain the change in total liabilities plus owners' equity between Years 3 and 4 ? 3. Balance sheet changes. Below are incomplete balance