QUESTION TWO (2) (a) Fluid power is controlled with the help of control devices called valves and are grouped in thre main categories: (i) Name these three (3) categories of valves. [3 Marks] (ii) Explain at least one (1) function/purpose of each valve category.[6 Marks] (b) Draw graphical for each of the following hydraulic components: (i) Pilot operated pressure relief valve.[2 Marks] (ii) 4/3 direct operated DCV; solenoid operated, spring centred, all ports closed in neutral position.[5 Marks] (iii) Variable displacement pump, external case drain, two direction of rotation, two flow direction.[4 Marks]