Write the output of the following C codes, with proper justification for each. 
i) main()
{
int i = 5, j = 6, k = 7;
printf("%d", i++ - ++j + ++k);
}
ii) main()
{
char day[10] = "SUNDAY";
day[0] = 77;
day[1] = 79;
printf("%s", day);
}
iii) main()
{
int i = 3;
while(i--)
{
int i = 1;
printf("%d ", i);
i++;
}
}
iv) int f(int n)
{
if(n < 1)
return n;
else
return n*n + f(n-1);
}
main()
{
printf("%d", f(5));
}
v) struct employee
{
char name[20];
int id;
long salary;
}emp = {"Piyush", 1, 50000};
main()
{
printf("Name = %s ", emp.name);
printf("ID =%d", emp.id);
printf("Salary = %d", emp.salary);
}

i) The output of this C code will be -8. The expression i++ - ++j + ++k is evaluated from left to right. First, i++ returns the current value of i (which is 5) and then increments i. Next, ++j increments j and returns the new value (which is 7). Finally, ++k increments k and returns the new value (which is 8). Substituting these values into the expression, we get 5 - 7 + 8, which is equal to -8.

ii) The output of this C code will be _______ _____ ___ __________ ______ ___ ________ _______.
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