# Make a function that returns the average of it's two arguments

# Make a function that prints the average of it's two arguments

# Make a function that takes a list, and prints the first element

# Make a function that takes a list, and returns the last element

# Make a function that takes a list, and returns how many elements
# are in the list

# Make a function that takes a list, and prints the elements one
# per line

# Make a function that takes three numbers, and returns the 
# middle number

# Make a function that takes three arguments, and prints 
# how many are above 10

# Make a function that takes a string as an arguments, and returns
# True or False depending if the first letter is a capital letter
# If the string is empty return false.

# Make a function that takes a string as an argument, and returns
# True or False depending if the string has more than 10 characters.

# Make a function that takes a list, and returns the middle valued element.
# If there are an even number of elements,either one is good.
# Return -1 if the list is empty.

# Make a function that takes a filename, and returns how many lines are
# in the file.  It should even work for empty files where you return 0.

# Make a function that takes a list as an argument, and returns another list with
# all of the elements in the range 1..100 but none of the others.

# Make a function that takes a string and a letter, and counts how many times
# the letter appears in the string.  
# countLetter("Ohio", "h") should return 1
# countLetter("i like cheese", "e") should return 4
# countletter("", "w") should return 0