int main() {
    char **last_names;
    // Assign a dynamically allocated char * array of length 4 to last_names. 
    // Then, allocate a character array of length 20 for each element of the array 
    // pointed to by last_names.
	char *array = malloc(sizeof(char) * 4);
    last_names = &array;
    char *array2 = malloc(sizeof(char) * 20);
    return 0
}
Assign a dynamically allocated char * array of length 4 to last_names. Then, allocate a character array of length 20 for each element of the array pointed to by last_names.