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How was the Physics Unit 4 exam?

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hey everyone, for the tension question. i added the C.F and the weight and got 7N. i was supposed to subtract them and get 3N but i dont know what happened. anyways my calculations for the C.F and W are correct. how many marks would i lose. is here a follow through for the graph question??
Tension = mv^2/r - mg, so answer was 3.
How many marks you might lose is upto the person marking and how lenient Edexcel are.
 
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Nooooooooooooo..!!!! I messed up! K was a constant. I didnt write its value. Otherwise my answer was going in the right direction. I hate my senses!
 
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You solve that by taking the vertical component of the magnetic field at point b, they gave you the angles.....it's so easy but I only realized the answer after I came home >.> =3
 
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