For which of these variables would you be interested in finding the biserial correlaon coecient rather than the point-biserialcorrelaon coecient?a.Public limited companies or non-publicly listed companies.b.Employees passing or failing their CIMA (accountancy qualificaon) exam.c.Companies offering a pension scheme to their staff or not.d.The provision of a company car for managerial posions or not