Problem $218$ points

In a tank process control, a specific control system is required. It assumes two solenoid valves, FILL $($SVI and DRAIN $($SV$2).$ The tank level sensor detects the tank level, it feedback two statuses; is completely ful $($High$)$ or completely empty $($LOW$).$

The process work as follow:

$-$ The system require a control box with star$/$stop and reset buttons.

$-$ Drain valve SV$2$ opens for $2$ seconds, and closes for $3$ seconds.

$-$ The process is repeated $10$ times until it stops, at the same time an indicator LED is turned ON to that the process is finished.

$-$ To repeat the process the reset button should be pressed, and the indicator LED should turn OFF.

$-$ During the process, if the tank level sensor detects that the tank is empty; Valve SVI opens and fi tank until the Level sensor detects that the tank is full.

$-$ The filling process has no impact on the drainage.

Design a full Ladder diagram that fulfill the tasks requirements.