Answer:
Wilson's compensation expense in 2018 for these stock options was $258.50 millions
Step-by-step explanation:
Compensation Expense in 2018 Stock Option =Estimated value of Option at Jan 1, 2013 = 26 Million X $47 = $1222 Million
Estimated value of Option at Jan 1, 2018=22 Million X $47
Estimated value of Option at Jan 1, 2018=$1,034 million
Options vest on January 1, 2022, therefore, Fair value is spread over 4 Years of vesting period= $1,034 million/4
Fair value is spread over 4 Years of vesting period=$258.50 millions
Wilson's compensation expense in 2018 for these stock options was $258.50 millions