1. (40 points) Define an integer vector and get several input from keyboard, then display the numbers in the vector. The for loop is required to write the display loop. 2. (30 points) Declare a vector container. Using keyboard to input several integer numbers, say at least six integer numbers; find the smallest number and display the result. 3. (30 points) Ask the user's first name, and display a welcome message. Then let the user input several strings (at least two strings) and sort them in alphabetical order