Given the attached knowledge base “students_courses.pl” containing students’ grades in some courses and courses’ prerequisites, you are required to write a Prolog program that solves the tasks explained below.
Task 1:
Get the list of students (IDs & grades in nested lists) who have taken a specific course.
Examples:
?- studentsInCourse(‘Robotics’, Students). Students = [[stud06, 62], [stud09, 29]]
?- studentsInCourse(‘Algorithms’, Students). Students = []
Task 2:
Get the number of students who have taken a specific course.
Examples:
?- numStudents(‘Algorithms’, Num). Num = 0
?- numStudents(‘Math 1’, Num).
Num = 4
Task 3:
Get the maximum grade that a specific student was able to obtain.
Examples:
?- maxStudentGrade(stud10, MaxGrade). MaxGrade = 97
?- maxStudentGrade(stud08, MaxGrade). MaxGrade = 71
Task 4:
Show a student’s grade digits in a specific course as a list of words.
Examples:
?- gradeInWords(stud04, ‘Database’, DigitsWords). DigitsWords = [five, nine]
?- gradeInWords(stud07, ‘Math 2’, DigitsWords). DigitsWords = [eight]
?- gradeInWords(stud01, ‘Programming 1’, DigitsWords). DigitsWords = [nine, zero]
Task 5:
Get a list containing the sequence of courses that a student needs to take in order to be able to take the target course. The query must only succeed if the student has already taken and successfully passed a course that can directly or indirectly lead to the target.
Examples:
?- remainingCourses(stud01, ‘Advanced Algorithms’, Courses). Courses = [‘OOP’, ‘Data Structures’, ‘Algorithms’]
?- remainingCourses(stud07, false.
?- remainingCourses(stud02, Courses = []
?- remainingCourses(stud05, Courses = [‘Electronics 2’] ?- remainingCourses(stud08, false.
‘Electronics 2’, Courses). ‘Networks’, Courses).
‘Computer Architecture’, Courses). ‘Data Warehouses’, Courses).
