please answer problems a,b and c

The average expenditure on Valentine's Day is $100.89. The average expenditure in a sample survey of 40 male consumers was $135.67, and the average expenditure in a sample survey of 30 female consumers was $68.64. The sample standard deviation for male consumers was $35, and the sample standard deviation for female consumers was $20. a. Write out the hypotheses for testing whether the average expenditures in male and female consumers differ. (2) b. What is the value of the test statistic? (3) c. Using a significance level of 5%, what are the p-value and the critical value? What is your conclusion? (10")