In need some help with this little programming .. I just got 3 errors ..

:'(

```
#include <stdio.h>
int main (void)
{
char A , B , C , D , E , F;
int id1[ ];
float grade[ ];
float marks[ ];
float average;
float num1, kk=0;
/********* Jami, Abdulrahman *********/
printf("Enter The Student ID: ");
scanf("%d", &num1);
for (kk=0; kk<num1; kk++);
{
scanf("%d", &id1[kk]);
scanf("%d", &grade[kk]);
}
for (kk=0; kk<num1; kk++);
{
if (grade [kk]>85 &grade [kk]<=100);
A=A+1;
if (grade [kk]>70 &grade [kk]<85);
B=B+1;
if (grade [kk]>55 &grade [kk]<70);
C=C+1;
if (grade [kk]>40 &grade [kk]<55);
D=D+1;
if (grade [kk]>25 &grade [kk]<40);
E=E+1;
if (grade [kk]>=0 &grade [kk]<25);
F=F+1;
}
/********* Jami, Abdulrahman *********/
float aveerage;
float avrg, sum, lk;
sum = sum + marks[lk];
average = sum / num1;
for (lk=0; lk<num1; lk++);
return average;
}
```