Floating Point Issues - General Questions

What will be the output of the program?

#include <stdio.h>

int main(void) {
    double d = 5.0 / 2;
    printf("%.2f\n", d);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    printf("%.3f\n", 2.0 / 3);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int i = 10;
    double d = i / 4;
    printf("%.2f\n", d);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    float f = 5 / 2;
    printf("%.2f\n", f);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    printf("%d\n", (int)3.99);
    return 0;
}