Programming

#include <stdio.h>
#include <stdlib.h>

struct Student {
    int studentNumber;
    int phoneNumber;
    char *studentName;        //Line 7
//    char studentName[20]; //Line 8
};

int main()
{
    struct Student *list;
    int numOfStudents;
    int x;
    int studentCounter = 1;
    
    printf("\nEnter the number of students you would like to input: ");
    scanf("%d", &numOfStudents);
    
    list = malloc(sizeof(list) * numOfStudents);
    
    for (x = 0; x < numOfStudents; x++) {
    printf("\nEnter name for student #%d: ", studentCounter);
        list[x].studentName=malloc(20);
    scanf("%s", list[x].studentName);        //Line 25
    printf("Enter student number for student #%d: ",
           studentCounter);
    scanf("%d", &list[x].studentNumber);            //Line27
    printf("Enter phone number for student #%d: ",
           studentCounter);
    scanf("%d", &list[x].phoneNumber);            //Line 29
    studentCounter++;
    }

    for (x = 0; x < numOfStudents; x++) {
    printf("%s, #%d, %d: \n", list[x].studentName, list[x].studentNumber, list[x].phoneNumber);
//        free(list[x].studentName);                 //Line 35
    }
for (x = 0; x < numOfStudents; x++) { free(list[x].studentName); }  //Line 37
    free(list);                        //Line 38
    return 0;
}

sizeof(struct Student)