I wonder if sleep() affects fork()

Question

your text

int main(void) { 
   if (fork()) {
        // 1. sleep(1); 
        printf("parent");
   }
   else {
    // 2. sleep(1)
    printf("child");
   }
}

l know sleep() and fork() ,But I confuse about sleep and fork()

1.What happens if first sleep is executed and second sleep is not executed? 2. also , What happens if second sleep is executed and first sleep is not executed?

As I expected, first question -> childparent and second question -> parentchild