On December 31, 2020, 5M Inc. approved a restricted stock unit plan to be awarded to executives. The plan included the following general terms. Each restricted stock unit is equivalent to one share of $1 par value, common stock of 5M Inc. o Restricted stock units vest three years after the date of grant, subject to forfeiture if employment is terminated prior to the end of the vesting period. o Shares are distributed after the vesting period if the employee is still employed by the company. On December 31, 2020, 72,000 restricted stock units were granted to key employees under this plan when the market price of the common stock was $25 per share. The company estimates that 15% of the restricted stock units will be forfeited and it is the company's policy to estimate forfeitures. Required a. Compute the total amount of compensation cost for the restricted stock unit plan. b. Prepare the journal entry on the date of grant, December 31, 2020. c. Prepare the journal entry on December 31, 2021. d. Prepare the journal entry on December 31, 2022. At that time, the company adjusts its estimate of forfeitures to 10%. e. Prepare the journal entries on December 31, 2023, to record compensation expense and distribution of shares, assuming actual forfeitures of 5,760 shares in 2023