# include & ltstdio.h & gt
void main()
{
int I;
int array[30]= { 0 };
int average[6]= { 0 };
for(I = 0; I & lt30; i++)
{
array[I]= 2 * I;
average[I/5]+= array[I];
}
for(I = 0; I<6; i++)
printf("%d ",average[I]);
}
//The second question
# include & ltstdio.h & gt
void main()
{
int i,j;
int array[2][3] = {{2,4,6},{8, 10, 12 } };
for(j = 0; j & lt3; j++)
{
for(I = 0; I<2; i++)
printf("%d ",array[I][j]);
printf("\n ")
}
}
//The third question
# include & ltstdio.h & gt
void main()
{
int I;
int choices[20]= { 0 };
int total[5]= { 0 };
Printf ("Please enter an option (1-5): \ n");
for(int I = 0; I & lt20; i++)
Scanf("%d ",& choose [i]);
for(int I = 0; I & lt20; i++)
If (select [I] > = 1。 & select [I] <; = 5)
total[choices[I]- 1]++;
Printf ("The result of selection is: \ n");
for(int I = 0; I<5; i++)
Printf ("product I is %d\n", total [i]);
}