20%) A restaurant owner is investigating his customers habit at his shop. He selected a random sample of 25 customers during a certain week. He found that The average amount of money spent of each customer was $8.75 with a standard deviation of $1.50. At the 0.05 level of significance, is there evidence that the population mean amount of money spent was different from $ 7? At the 0.05 level of significance, is there evidence that the population mean amount of money spent was more than $10? At the 0.05 level of significance, is there evidence that the population mean amount of money spent was less than $ 8? If you are the restaurant owner, what do you suggest to the restaurant based on the results of (3a, 3b, 3c)? Please complete your answer with curves which show normal distributions.