Q$1.$ Assume p is a pointer to a float. Write a statement that will dynamically allocate a float variable and store its address in p$.$ Write a statement that will free the memory allocated in the statement you wrote above. $(4$ points$)$ Q$2.$ Assume p is a pointer to a float. Then, write a statement that will dynamically allocate an array of $6000$ floats and store its address in p$.$ Write a statement that will free the memory allocated in the statement you wrote above. $(4$ points$)$ Q$3.$ What is a null pointer? $(2$ points$)$