#You will notice I have given some test cases, but
#it pays to be a "doubting Thomas" and add others.
#
#Problem 0:
# write code to tell if item is in at an even-numbered
# index of x.
#
x = [2,3,4,5]
item = 2
print(item in x[::2])
item = 5
print(not(item in x[::2]))  ##prints true if test passes.
#
#Problem 1:
# write code to tell if item is in at an odd-numbered
# index of x.
#
x = [2,3,4,5]
itme = 2

#
#Problem 2:
x = [1,2,3,4,5,6,7,,8,9,10]
#write code that chops off the head and tail of a list
# of any length
print(x == [2,3,4,5,6,7,8,9,10])
#
#
#Problem 3:
x = ["cat", "dog", "elephant", "ferret", "goat", "hyena", "cat"]
item = "cat"
#write code to see if item is present in the list more than once.

#
#Problem 4:  There is a builtin function named sum.  Use it here.
x = [2,3,4,5,6,7]
result = 15 ##calculate the sum of the odd-indexed entries

#
#
#Problem 5:  Create an empty list. Add the items
#"Lincoln", "Jefferson", "Washington", "Grant" to the list
#in that order, one at a time.  Print the list. Then empty it.
#and print the result.
presidents = []

#
#Problem 6:
#
#
#Problem 7:
#
#
#Problem 8:
#