py Lab10 7 Lab10 > ex5.py >... ex3.py Lab10 1. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 = 1 SENTINEL -99 2 #Top 20 countries by area 3 countries ['Russia', 'Canada', 'China', 'United States', 'Brazil', 'Australia', 4 'India', 'Argentina', 'Kazakhstan', 'Algeria', 'DR Congo', 'Greenland', 5 'Saudi Arabia', 'Mexico', 'Indonesia', 'Sudan', 'Libya', 'Iran', 6 'Mongolia', 'Peru'] start = int(input('Enter the start index for the slice: (or -99 to stop) ')) size= len( while start != ex4.py Lab10 # SENTINEL end int(input('Enter the end index for the slice: ')) if start < 0: # convert negative index to positive start = size + start if start