10. Suppose that you have the following statements: ofstream outfile; double distance = 375; double speed = 58; double travel Time; Write C++ statements to do the following: a. Open the file travel.dat using the variable outfile. b. Write the statement to format your output to two decimal places in fixed form. c. Write the values of the variables day, distance, and speed in the file travel.dat. d. Calculate and write the travelTime in the file travel.dat. e. Which header files are needed to process the information in (a) to (d)