need help with 2020 journal entry

On October 15, 2015, the board of directors of Ensor Materials Corporation approved a stock option plan for key executives. On January 1, 2016, 29 million stock options were granted, exercisable for 29 million shares of Ensor's $1 par common stock. The options are exercisable between January 1, 2019, and December 31, 2021, at 90% of the quoted market price on January 1, 2016, which was $20. The fair value of the 29 million options, estimated by an appropriate option pricing model, is $6 per option. 2.9 million options were forfeited when an executive resigned in 2017. All other options were exercised on July 12, 2020, when the stock's price jumped unexpectedly to $28 per share. Required: When is Ensor's stock option measurement date? January 1, 2016 October 15, 2015 January 1, 2019 December 31, 2021 Determine the compensation expense for the stock option plan in 2016. (Ignore taxes.) (Enter your answer in millions (i.e., 10,000,000 should be entered as 10).) Prepare the necessary journal entries. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field. Enter your answers in millions rounded to 1 decimal place (i.e., 5, 500,000 should be entered as 5.5).)