A teacher wrote a test consisting of five dichotomous items and wants to know if the items…

A teacher wrote a test consisting of five dichotomous items
and wants to know if the items adequately cover the content domain being
tested. He decides to use the KR 20 formula to determine the internal
consistency of the test. Using the following information, calculate the
internal consistency using the KR 20 formula. Are the test scores reliable in
terms of internal consistency?