Walker, Incorporated uses stock options as a compensation incentive for its top executives. On January 1, Year 1, 25,000 options were granted, each giving the holder the right to acquire one $5 par common share. The exercise price is $60 per share. The vesting period is 4 years. Options vest on January 1, Year 5 and cannot be exercised before that date and will expire on December 31, Year 8. The fair value of the 25,000 options, estimated by an appropriate option pricing model is $50 per option. a. Make the journal entries to record compensation expense for Year 1.