Can't do sorry, most of the answers are done on the paper itself. I might upload MC questions though.copy of the paper??
Yeah that circuit question was really hard.
Thanks machine2035, my drawing sounds similar to yours. ('sunken' outer circle with full inner one, one side sectioned except for the small square of the 'sunken' circle).
On the L: D ratio, i just took tan of the angle, it looked like a possible solution?
For weight I found the sum of the vertical forces... I got eighty something? someone confirm if possible?