Using Python3:

1. Assign True to the variable has_dups if the string s1 has any duplicate character (that is if any character appears more than once) and False otherwise :

2. Write an expression whose value is True if all the letters in the str associated with s are all lower case.

3. Write an expression whose value is the result of converting the int value 42 to a str (consisting of the digit 4 followed by the digit 2).