Tools HW4-2.pdfLecture_W5_Sp19 123% 3- Write a user-defined function that calculates grade point average (GPA) ona scale of 0 to 4, where A = 4, A-= 3.7, B+ = 33, B = 3, B-= 2.7, C+ 2.3, C- 2, C-1.7, D+ 1.3 D 1, and E 0. For the function name and arguments, use av - GPA (g,h). The input argument g is a vector whose elements are the numerical values of the grades. The input argument h is a vector with the corresponding credit hours. The output argument av is the calculated GPA. Use the function to calculate the GPA for a student with the following record: GradeA Credit Hours 433 2 3 4 3 3 Tools HW4-2.pdfLecture_W5_Sp19 123% 3- Write a user-defined function that calculates grade point average (GPA) ona scale of 0 to 4, where A = 4, A-= 3.7, B+ = 33, B = 3, B-= 2.7, C+ 2.3, C- 2, C-1.7, D+ 1.3 D 1, and E 0. For the function name and arguments, use av - GPA (g,h). The input argument g is a vector whose elements are the numerical values of the grades. The input argument h is a vector with the corresponding credit hours. The output argument av is the calculated GPA. Use the function to calculate the GPA for a student with the following record: GradeA Credit Hours 433 2 3 4 3 3