Hi Everyone! Quick Question on 2 questions that I cannot figure out on the 2012 Morning section mock.

Question 22 - How did they come up with the number like -0.375 and 0.958. I know the formula is given but they don’t show how.

Question 23. How did they come up with the weights for the FOF (0.309) and the weight for PSMG (0.691).

Any help would be greatly appreciated! Thanks