Combined probability matrix Pilot paper Q3

Part b (i) (ii).
(i) A fall of 12% from the current level would result in a unit cost of £41.21 x 88% = £36.26. However, the combined
probability of this cost level being achieved is only 18% (this can be abstracted from the probability matrix). This might,
therefore, be seen as a ‘risk seeking’ stance if management decide to proceed with the re-design.

I want to know how this 18% was calculated.

(ii) Other members of the management team are not willing to proceed with the re-design if it might lead to a cost increase from the current level. There is a 32% combined probability that the changes could result in a unit cost greater than the
current level of £41.21. But there is also a 66% likelihood that the unit cost of product A could be less than the current level. This is a ‘risk averse’ stance since management are not swayed by the 66% likelihood that unit costs may fall.

Here I want to know how 32% and 66% were calculated.