Problem 19-1 Stock options; forfeiture; exercise [LO19-2] f directors of Ensor Matertals Corporation approved a stock option plan for key executives. On uary 1, 2018, 20 million stock options were granted, exercisable for 20 million shares of Ensor's $1 par common stock. The options are exercisable between January 1, 2021 and December 31, 2023, at 80% of the quoted market price on January 1, 2018, which was $15. The falr value option to recognize forfeltures only when they occur of the 20 million options, estimated by an appropriate option pricing model, is $3 per option. Ensor chooses the Ten percent (2 million) of the options were forfeted when an executive resigned in 2019. All other options were exercised on July 12 2022, when the stock's price jumped unexpectedly to $39 per share Required: 1. When is Ensor's stock option measurement date? 2 Determine the compensation expense for the stock option plan in 2018. (ignore taxes) 3. & 5. Prepare the necessary journal entries. Complete this question by entering your answers in the tabs below. Req 1 and 2 Req 3 and 5 When is Ensor's stock option measurement date? Determine the compensation expense for the stock option plan in 2018. (Ignore taxes.) (Enter your answer in millions (i.e., 10,000,000 should be entered as io 1. Stock option date 2. Compensation expense million Req 3 and 5>