In setting up a computer system for his firm to use in quality control, an engineer has four choices for the main unit: IBM, VAX, Honeywell, or HP. There are six brands of CRTs that can be purchased and three types of graphics printers.
(a) If all equipment is compatible, in how many ways can the system be designed?
(b) If the engineer wants to be able to use a statistical software package that is only available on IBM and VAX equipment, in how many ways can the system be designed?