Please answer for a,b

4. A personal tness trainer's fee is 5?5 per hour. Based on her past records, she determined that 20% of her clients required only one hour of training, 65% required two hours and the rest required 3 hours of training. She did not have a client that required more than 3 hours of training. Records also showed that she incurred a cost of $10 for even.' hour that she spent with a client. a) Write down the probability distribution of her net profit (profit: revenue cost}. [3 marks] b} In one week, she sees 3 clients. What total prot can she expect to earn for this week? Explain ~your answer. [3 marks]