Question 1: Consider the following linked structure of integer items. Write a single C++ statement which will achieve each of the following. Note that you can use any of d to modify the structure as required; there is no need to free allocated memory. (2 marks) Data info next 25 The user's Pointer to the data next node Ptrl ptr2 a) Change the node containing 30 to hold 50 b) Make Data point at the node containing 45: c) Test if the fifth node has a non-zero value: d) Remove the last 3 nodes from the linked structure