Q$3-$ For the hydraulic circuit shown below;

$3-$a What is the name, function and full description of each of the labelled components?

$3-$b If the pump of $15$ cm $3$ geometric volume runs at $1450$ rpm $,$ calculate its volumetric efficiency if it discharges $\backslash (20\backslash$mathrm$\{$l$\}/\backslash$mathrm$\{$min$\}\backslash ).$

$3-$c If the maximum load pressure is $150$ bar, assume any missing data and then find the electric motor power in kW $.$

$3-$d If the cylinder has the data $\backslash (63/32/300\backslash$mathrm$\{$~mm$\}\backslash )($piston and rod diameters, and stroke$),$ find its extension and contraction strokes times without any speed control.

$3-$e What kind of speed control is used in this circuit?

$3-$f The relief valve set pressure is $10$ bar above the maximum load pressure, and the cylinder needed extension speed is $\backslash (90\backslash \%\backslash )$ of its speed without any control. If the load is $40$ kN and the counterbalance valve $(1$V$4)$ set pressure is $10$ bar $,$ find the speed control valve orifice area.