Taking values from one file and after some calculation and a bit changes need to print into another file in python

below is c.txt

CO11 CSE C1 8
CO12 ETC C1 8
CO13 Electrical C2 12
CO14 Mech E 5

my program needs to print a course summary on screen and save that summary into a file named cr.txt. Given the above c.txt, your program output should look like below. The content of course_report.txt should also be the same, except the last line. Course names in the second column use * to indicate a compulsory course and – to indicate an elective course. The fourth column is the number of students enrolled in that course. The fifth column is the average score of the course.

CID Name Points. Enrollment. Average.
----------------------------------
CO11 * CSE 8 2 81
CO12 * ETC 8 10 71
CO13 * Electrical 12 8 61
CO14 - Mech 5 4 51
----------------------------------
poor-performing subject is CO14 with an average 51.
cr.txt generated!

below is what I've tried:

    def read(self):
        ctype = []
        fi = open("c.txt", "r")
        l = fi.readline()
        while l != "":
            fields = l.strip().split(" ")
            self.c.append(fields)
            l = fi.readline().strip()
        f.close()
        # print(f"{'CID'}{'Name':>20}{'Points.':>16}{'Enrollment.':>18}{'Average.':>10}")
        # print("-" * 67, end="")
    print()
        for i in range(0, len(self.c)):
            for j in range(len(self.c[i])):
                obj = self.c[i][j]
                print(obj.ljust(18), end="")
        print()

    print("-" * 67, end="")
    print()