1. You win a free ticket a Lady Gaga concert (the ticket can't be resold...also, you have been vaccinated, as has Lady Gaga, and everyone else at the concert). On the same evening as the Lady Gaga concert there is a Gucci Mane concert. The tickets to the Gucci Mane concert have a price of $40, and the value to you of attending the Gucci Mane concert is $50. What is the opportunity cost of attending the Lady Gaga concert? (Be careful...my guess is 50% of you will get this question wrong). (3) a. 0 b. $10 c. $40 d. $50 e. Can't be determined because the value of attending Lady Gaga isn't provided.