Charlotte, aged 13, is a guitar virtuoso in Queensland. She has signed a three-year contract with Mick to learn specific guitar techniques to improve her skills. The terms of the contract stated that:
a. Mick would teach Charlotte guitar free of charge.
b. During the four-year period, Charlotte could not accept performance engagements for the guitar other than those under Mick.
c. Mick would employ Charlotte to perform on stage for at least two paid performances per year.