1. play with list and set

L1=[2, 3, 4,10] L2=[5,3,4,9,10,15]

Print out the numbers that exist in both variables L1 and L2 using set operations

Print out numbers that exists in either L1 or L2, but not both using set operation

Print out numbers that exist in L1 but not in L2.

merge L1 and L2 and save it into variable L3

Add the following numbers to L2, 103, 20, 34 using append() function of list.