Describe the employees' full name, positions, located city and office phone number within Colorado state.
full name = firstname, lastname; Colorado state refers to state = 'CO'; positions refers to positiontitle; located city refers to locationcity; office phone number refers to officephone;
SELECT T1.firstname, T1.lastname, T3.positiontitle, T2.locationcity, T2.officephone FROM employee AS T1  INNER JOIN location AS T2  ON T1.locationID = T2.locationID INNER JOIN position AS T3  ON T3.positionID = T1.positionID WHERE T2.state = 'CO'