Evaluate the following for each expression that is successfully evaluated, determine its value and type for unsuccessful expression, state the reason.

(a) len("hello") == 25/5 or 20/10

(b) 3 < 5 or 50/(5 - (3 + 2))

(c) 50/(5 - (3 + 2)) or 3 < 5

(d) 2 * (2 * (len("01")))

In Python, strings are immutable while lists are mutable. What is the difference?

Write an expression that uses exactly 3 arithmetic operators with integer literals and produces result as 99.

A program runs to completion but gives an incorrect result. What type of error would have caused it?