pressure(1).png In the picture аbоve, while the the rаte-оf-flоw vаlve is closed, the gauge shows 15 psi (15 pounds per square inch). When the rate of flow valve is opened, the gauge shows 10psi. Please answer the following questions: 15 represents the [BLANK-1]. 10 represents the [BLANK-2]. 5 represents the [BLANK-3].