I've attached the c++ code, I need help with the questions on the other attachment

a) Using raw (ordinary) pointers has a number of serious drawbacks. Name three issues which can occur when using raw pointers and for each issue provide a short code sample illustrating the problem. (9 marks) b) Examine the code in the figure and answer the following questions: i) This program compiles and runs but has undefined behaviour in certain circumstances. Determine what these circumstances are and explain why the behaviour is undefined. (5 marks) ii) Identify the particular line numbers in the main function at which the behaviour may be undefined. (2 marks) iii) Rewrite the LuckyPacket class using a unique_ptr to Toy and provide additional functions which will ensure correct and consistent behaviour when it is used in main. ( 8 marks)