VEVOR Adult Tricycle 7 Speed Cruise Bike 20 inch Adjustable Trike with Bell Brake System Cruiser Bicycles Large Size Basket for Exercise (Yellow 20 7Speed)

Would it be suitable for 145 cm adult

Would this bike be suitable for someone who is 6ft tall?

The first step in assembling my trike with 7 speed gears is the derailer. The bolt supplied does not screw into the hole on rear axle . Can I use a nut and bolt to fix the problem?

Does the Bike comes assembled?

Is there any locking system what are the accerites along with the cycle