Hi I need help with the following questions in C++. Thanks in advance!

10) What is a vector used for? What does it mean when we say that vector is a class template? 11) Demonstrate how you declare a vector and add elements to it. Explain what an iterator is in this context and demonstrate how you use one. 12) What are adaptors and algorithms used for in STL? Give an example for each, explaining their purpose 13) Explain each of the following C++11 features and give an example illustrating the usage of each a. auto. b. Range for