Some of the Employees of Righteous Apps,Inc

Some of the employees of Righteous Apps,Inc.,decide that they want to be represented by the Science Workers Union in bargaining with Righteous Apps over overtime pay and the times that the offices open and close.Righteous Apps,and some employees,including Truman,are against the union.Who can demand that a union election be held If the union is elected,does it have to represent Truman If the union is elected,does Righteous Apps have to bargain over overtime pay and the times that the offices open and close