Write a program to generate a report based on input received from a text file. Suppose the input text file student_grades.txt contains the students Last name , First name, SSN, Test1, Test2, Test3 and Test4. i.e. Alfalfa Aloysius 123-45-6789 40.0 90.0 100.0 83.0 49.0 Generate the output Report File student_final.txt in the following format : LastName FirstName SSN Test1 Test2 Test3 Test4 FinalGrade i.e. Alfalfa Aloysius 123-45-6789 40.0 90.0 100.0 83.0 49.0 D- Last name First name SSN Test1 Test2 Test3 Test4 Final Grade The program must be written to use the enum letter_grade : enum letter_grade {A, A_PLUS, A_MINUS, B,B_PLUS, B_MINUS, C, C_PLUS, C_MINUS,D,D_PLUS,D_MINUS,F } ; Use the following function prototype for deriving letter grade : letter_grade deriveGrade(double average) ; The average is calculated as follows : (test1 + test2 + test3 + test4)/4.0 The function deriveGrade should derive the letter_grade of the student based on the following grading scale.

Letter Grade	Percentage	GPA
A+	97%+	4.33/4.00 or 4.00/4.00
A	93%-96%	4.00/4.00
A-	90%-92%	3.67/4.00
B+	87%-89%	3.33/4.00
B	83%-86%	3.00/4.00
B-	80%-82%	2.67/4.00
C+	77%-79%	2.33/4.00
C	73%-76%	2.00/4.00
C-	70%-72%	1.67/4.00
D+	67%-69%	1.33/4.00
D	63%-66%	1.00/4.00
D-	60%-62%	.67/4.00
F	0%-59%	0.00/4.00

Also provide the following function :

string convertToText(letter_grade grade) ; //This function converts a letter_grade type to a string type.

NOTES :

Place the namespace in a header file (i.e. grade.h)

and place both the enum type and letter_grade function in the namespace stdGrade