Just to point out that as JAR 25.335(b)(2) (c)(i) says that Va may not be less than Vs1 times the square root of CnMax, the diagram at 333 has to be wrong, as it shows a lower Va. A1 and A2, agree, are just points that indicate certain flight conditions, but if 335 is right, A2 is the same as A. Note that the current Internet 335 has left out the necessary square root sign in the reference given above.
Note also that in the current Internet JARs there is no 331(c)(2)(i) or (ii), (2) having been reduced to a single sub-para.
I note these discrepancies only to illuminate what a b.....s muddle the JARs are. Gedifroggy raised the point in relation to teaching for the ATPL exams, and I repeat my advice to all in that game - stay out of detailed explanations of the JARs. The questions are basic and limited.
Dick W