I'm taking a Python course and I'm having trouble figuring out how to write a code to complete this task: Implement the build_dictionary() function to build a word frequency dictionary from a list of words.

Ex: If the words list is:

["hey", "hi", "Mark", "hi", "mark"]
the dictionary returned from calling build_dictionary(words) is:
{'hey': 1, 'hi': 2, 'Mark': 1, 'mark': 1}
Ex: If the words list is:
["zyBooks", "now", "zyBooks", "later", "zyBooks", "forever"]
the dictionary returned from calling build_dictionary(words) is:
{'zyBooks': 3, 'now': 1, 'later': 1, 'forever': 1}
The main code builds the word list from an input string, calls build_dictionary() to build the dictionary, and displays the dictionary sorted by key value.
Ex: If the input is:
hey hi Mark hi mark
the output is:
Mark: 1
hey: 1
hi: 2
mark: 1

Thanks for your help!