need some help with the three funtions

#ifndef LIST-H #define LISTH 1 - #include #include algorithm 5 6 using namespace std 8 9 template 10 class List private: 12 13 // struct for singly-Linked List nodes struct Node 16 17 18 19 20 21 dataj Node next; Node( const T & d = T(), Node * n = nullptr) : data d , next n 23 24 25 26 27 28 29 30 31 32 public: // constructors List init )5 Listf clear 5 34 35 36 37 Disclaimer: C++ conventions telL us that we should have a couple of additional constructors here (a copy constructor, assignment operator * etc.) 39 40 41 42 43 However, to keep things simple for now we wiLL ignore that convention * (since the exposure to C++ s pretty variable it seems -- some students having taken 141 before Last semester; some students coming from 107, etc