(b) Charles, a trainer, was struggling with his online lessons. He asked his wife, Michele, to teach him the various functions in the online platform, Bonkers. Charles promised to pay his wife $100 per hour to guide him on the use of the Bonkers. After spending 2 hours on the laptop, Charles managed to familiarise himself with the functions and was happy with the results. Charles changed his mind about paying his wife $200 and said that he would treat her for dinner instead. Discuss whether Michele may enforceable the agreement to pay $200. (13 marks)