Calculate the minimum pressurb

$2$

$25,000kg$ vertically using a single acting cylind in in mPa required to lift a load of cylinder to have an efficiency of $-100\%$ and the rod to directly lift the load platform $($ie$,$ the pump pressure is applied to the end without the rod$).$

Round your answers to the next higher whole bar and mPa $.$

Calculate the minimum and maximum flow rate in litres$/$minute of a variable displacemen piston pump with $5$ pistons and each having diameter of $10$ mm $.$ The stroke varies from $20$ mm to $90$ mm and the pump operates at $1100$ rpm $.$

Round your answer to one decimal place of a litre.