Question 4 4 pts Match each variable type with its description: Process Input Variable [ Choose ] [ Choose A product or process requirement that is of no matter to the customer Process Output Variable 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 Critical to Quality [ Choose ] Key Process Output Variable [ Choose ] Key Process Input Variable [ Choose ]