The function below takes a single string parameter: input_string. If the input contains the lowercase letter z, return the string 'has the letter z'. Otherwise, return the string 'not worthwhile'.

# string_contains function is defined with input_string

# as arguments

def string_contains(input_string):

   # if-statement that check if letter z is in input_string

   if 'z' in input_string:

       # it print"has the letter z" if it has z

       print("has the letter z")

   else:

       # else it print "not worthwhile"

       print("not worthwhile")

# string_contains function is called

string_contains("The animal is zebra")        

string_contains("learning is fun")

Explanation:

The code is written in Python and well commented.

Image of the output when the function is called is attached.

answer: 500 wph.

explanation: