c programming code pls

6) typedef struct char name [50] int id; char dept[20]; double cgpa; \} student; i) Write a function void saveByDept (char *fileName, char *deptName, student allStudents[], int size) that will save the information of all students who belong to the department with name pointed to by deptName into a text file. [The name of the file is given as an input parameter, filename]. [Once the file is created in part (i), it will contain the information of students who belong to a particular department. You will use this information in part (ii)] ii) Write another function to delete the students of the department with a CGPA greater than or equal to 3 from the file you have created in part (i). 7) Write a C code to find the sum of the following series singrecursion: 1/1!+2/2!+3/3!+N/N! 8) Consider the Fibonacci series: 0,1,1,2,3,5,8,13 Compute Fibonacci number n (say F(6), here F(6)=8 ) of the Fibonacci series 1) without recursion (iterative method) 2) with recursion