You have been given a file with two columns: a student id and an integer (whole number) mark for an assignment between 0 and 40 inclusive. The file will look something like:

123123 23

124124 25

143124 10

124234 13

It is not known at the outset how many assignment marks are in the file, however the file will be terminated by EOF (end of file).

a. Draw a flowchart (following the conventions used in class) that reads the file and then calculates and prints the number of students who received a mark higher than 20.

b. What is the likely complexity of your program using big-O notation? Clearly point out what the primary parameters are and define your terms.