Match each variable type with its description: Process Input Variable Process Output Variable Critical to Quality Key Process Output Variable Key Process Input Variable [Choose ] [Choose ] A product or process requirement that is of no matter to the customer A product or process knob or control that affects characteristics of importance to the customer A product or process knob or control that has no impact on the process A product or process requirement that must be present to make the customer happy but that the customer doesn't know to explicitly specify A product or process requirement specifically requested by the customer [Choose ] [Choose ] [Choose ]