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determine

1- the tension required in the cable

2- angular acceleration in rads/sec

3- Accelerating torque in Nm at the winding drum shaft required to accelerate the system

4- The total driving torque in Nm required at the winding drum shaft to produce the required motion of the whole system

I got 1 as 90,185N

2 - 1.33 rads/s

3- 5411Nm

4 is 5531Nm but I am not sure how to derive at this answer

The question then goes on to velocity time diagram like questions and asking for sketches

the hoist covers a distance of 20m accelerating at 0.8ms from rest to a max speed then decelerates at the same rate, i.e for 10m constant acceleration

the part of the question im struggling with is where it asks for the maximum velocity of the hoist, this is 4ms but I am beat for knowing the calculation as I don't have an specific time, Could anyone help me with the formula required to achieve the answer of 4ms?

Many thanks!