Need help with these questions for C++ programming language.

45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. What is the BigO of a vector push_back function if its reserve function creates a new array that is four times the size of the current array? We might choose a linked list over a vector because The default copy constructor may be used EXCEPTI Inserting at the nun of a singlelinked list is What is the proper relationship between class List and class nun? Why is a Node typically defined as a nun of the host class? What is C++ object delegation? What is a C++ concept? What is a C++ functor? What is an advantage of a default parameter? What is type size_t