Please give me the right answer

Determine the location and value of the absolute extreme values of f on the given interval, if they exist. f(x) = cos 5x on 6'3 What is/are the absolute maximum/maxima of f on the given interval? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The absolute maximum/maxima is/are at x = O (Use a comma to separate answers as needed. Type an exact answer, using it as needed.) O B. There is no absolute maximum of f on the given interval. What is/are the absolute minimum/minima of f on the given interval? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The absolute minimum/minima is/are at x = (Use a comma to separate answers as needed. Type an exact answer, using it as needed.) O B. There is no absolute minimum of f on the given interval