Which of the following function declarations correctly expect an array as the first argument? void f1(float array[ ], int size); void f1(int\& array, int size); void f1(int array[100], int size); void f1(int array, int size); void f1(int array[100], int size); and void f1(float array[ ], int size);

The correct function declarations that expect an array as the first argument are: 1. `void f1(float array[], int size);` 2. `void f1(int array[100], int size);` **Explanation:** - **`void f1(float array[], int size);`** - This function expects a float array as the first argument. In C++, when you declare a function parameter as `float array[]`, it decays to a pointer to `float` (`float*`), effectively accepting an array. - **`void f1(int array[100], int size);`** - This function expects an int array of size 100 as the first argument. Similarly, in C++, declaring a parameter as `int array[100]` decays to a pointer to `int` (`int*`), accepting an array. **Incorrect Declarations:** - **`void f1(int& array, int size);`** - This function expects a reference to a single `int`, not an array. - **`void f1(int array, int size);`** - This function expects a single `int`, not an array. **Summary:** Only the declarations using `float array[]` and `int array[100]` correctly expect an array as the first argument. **Final Answer:** Only the declarations using float array[] and int array[100] correctly expect an array as first argument.