1. What does following statement do? print (2 * 3) + 3; 2. Why is the ‘use strict;’ statement useful? 3. Write a regular expression that removes trailing white space from a string 4. What is the difference between a lexical variable and a package variable? 5. What does the following statement do? $var = $#array; 6. What does the ‘<=>’ operator do? 7. Given the following data structure. How would you access the value ‘c’ in the scalar $a? $a = [ ‘a’, ‘b’, [ ‘c’, ‘d’ ], ‘e’ ];