If anyone could please help figure these out and explain them, it would be appreciated!

B1-25 Accounting for Equity Investments Obj. 2 Williamson Inc. owns 15% of the outstanding common stock of Olson Corporation. For purposes of determining the proper accounting for Williamson Inc.'s investment in Olson Corporation, is it proper to assume that Williamson Inc. controls Olson Corporation? Explain. B1-30 Journalizing Equity Investment Transactions; Less than 20% Ownership Obj. 2 On January 23, 15,000 shares of Aurora Company's common stock are acquired at a price of $25 per share. On April 12, a $0.50-per-share dividend was received on the Aurora Company stock. On June 10, 6,000 shares of the Aurora Company stock were sold for $31 per share. At the end of the accounting period (December 31), the fair value of the remaining 9,000 shares of Aurora Company's stock was $30 per share. Aurora Company has 200,000 shares of common stock outstanding. acquired at a price of $25 per share. On April 12, a $0.50-per-share dividend was received on the Aurora Company stock. On June 10, 6,000 shares of the Aurora Company stock were sold for $31 per share. At the end of the accounting period (December 31), the fair value of the remaining 9,000 shares of Aurora Company's stock was $30 per share. Aurora Company has 200,000 shares of common stock outstanding Journalize the entries for (a) the purchase of the stock, (b) the receipt of the dividends, (c) the sale of 6,000 shares, and (d) the change in fair value. Answer Check Figure: Gain on Sale of Investments, $36,000 B1-31 Journalizing Equity Investment Transactions; Less than 20% Ownership Obj. 2 On September 12, 3,000 shares of Denver Company's common stock are acquired at a price of $40 per share. On October 15, an $0.80-per-share dividend was received on the Denver Company stock. On November 10, 1,600 shares of the Denver Company stock were sold for $37 per share. At the end of the accounting period (December 31), the fair value of the remaining 1,400 shares of Denver Company's stock was $35 per share. Denver Company has 400,000 shares of common stock outstanding. dividend was received on the Denver Company stock. On November 10, 1,600 shares of the Denver Company stock were sold for $37 per share. At the end of the accounting period (December 31), the fair value of the remaining 1,400 shares of Denver Company's stock was $35 per share. Denver Company has 400,000 shares of common stock outstanding. Journalize the entries for (a) the purchase of the stock, (b) the receipt of the dividends, (c) the sale of 6,000 shares, and (d) the change in fair value. Answer Check Figure: Loss on Sale of Investments, $4,800