Help Plz!!! Scissor Lift, need help.

[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]Project is in the process of producing a scissor lift that rotates a manual wheel and lifts 700kg.[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]But in fact, I've never done this kind of structure, so I need help.[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]I am attaching a simple picture, so please help me.[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]And if possible, please let me know the calculation.[/FONT][/FONT][/COLOR][/COLOR]

[URL="https://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=2310&d=1562338651"]QUESTION 1.jpg[/URL]

[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]1. What is the force of the sicssor lift on the driveshaft (TR BOLT)?[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]2. Torque value when driving a handle[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]3. A measure to turn the wheel by human power.[/FONT][/FONT][/COLOR][/COLOR]
[COLOR=#333333][COLOR=#333333][FONT=Verdana][FONT=Verdana]4. When the maximum drive angle of the shift is 40°, how many turns of the handle must be turned from 0° to maximum height?[/FONT][/FONT][/COLOR][/COLOR]