These are recommended practices that have been proven effective and efficient for other people to adopt as guidelines.

If the capacity of a vector named names is 20 and the size of names is 19, which of the following statements are legal?

a. names.push_back("myName"); b. names[18]="myNmae"; c. all of the above d. none of the above

You decide to analyze a sample of vehicle records. What sampling methods are available to you? Which one should you use, and why?

What will be an ideal response?