Rhino Corporation (E \& P of $700,000 ) has 4,000 shares of common stock outstanding. The shares are owned as follows: Abby, 2,000 shares; Don (Abby's son), 1,500 shares; and Willy (Abby's uncle), 500 shares. In the current year, Rhino redeems all of Abby's shares. Determine whether the redemption can qualify for sale or exchange treatment under the complete termination redemption rules in each of the following independent circumstances. 1. Abby remains as a director of Rhino Corporation. 2. Three years after the redemption, Abby loans $100,000 to Rhino Corporation and receives in return a two-year note receivable. 3. Don replaces Abby as president of Rhino Corporation. 4. Six years after the redemption, Abby receives 250 shares in Rhino as a gift from Willy