Can you please help me with the following problem?Review the following information and answer correctly. A reports states that the average amount spent for Birthday's Day is $100.89. Do male and female customers vary in the sums they spend? The average expenditure in a sample survey of 40 male customers was $138.67, and the average expenditure in a sample survey of 30 female customers was $66.64. Based on past surveys, the standard deviation for male consumers is assumed to be $35, and the standard deviation for female customers is assumed to be $20.   (a) What is the point estimate (in dollars) of the difference between the population mean expenditure for males and the population mean expenditure for females? (Use male − female.) $ _______________________________   (b) At 99% confidence, what is the margin of error (in dollars)? (Round your answer to the nearest cent.) $ _______________________________   (c) Develop a 99% confidence interval (in dollars) for the difference between the two population means. (Use male − female. Round your answer to the nearest cent.) $_______________________ to $____________________________