The following data correspond to the grades obtained by the students of a course:

4,0 - 5,0 - 4,0 - 5,0 - 4,0 - 7,0 - 7,0 - 6,0 - 5,0 - 6,0 - 2,0 - 2,0 - 4,0 - 7,0 - 6,0 - 7,0 - 3,0 - 7,0 - 4,0 - 4,0 - 4,0 - 7,0 - 7,0 - 3,0 - 5,0 - 7,0 - 4,0 - 5,0 - 6,0 - 5,0 - 3,0 - 7,0 - 6,0

The following is required:

(a) Organize the data in a frequency table including intervals, absolute and cumulative frequencies, and percentages of both frequencies.

(b) How many students are there in the course?

(c) What percentage of the students obtained a 6.0?

(d) How many students scored 4.0 or less?

(e) What percentage of the students scored a 5.0 or higher?