Suppose we have a struct "node" defined as follows: struct node { int data; struct node * next; }; Write a function named createNode that has one integer argument. The function (a) allocates a new struct node, using malloc, (b) sets the data field of the new node to the value passed in by the function, (c) sets the next field of the new node to NULL (zero), and (d) returns the address of the new node.