What is the length of a? How many elements does it contain?

(a)	What is the length of a?
(b)	How many elements does it contain? What are their types?
(c)	How many integers?
(d)	What does len(a[2]) return?
(e)	What does a[len(a)] evaluate to?
(f)	What does a [-1 * len(a)] evaluate to?

Answer = 

(a)	What is the length of a?	4
(b)	How many elements does it contain? What are their types?	It contain 4 element. 3 integer type & 1 list.
(c)	How many integers?	3 integer
(d)	What does len(a[2]) return?	2
(e)	What does a[len(a)] evaluate to?	It give error.
(f)	What does a [-1 * len(a)] evaluate to?	Output:- 1