Driver assistance & sound pack - Europe/ Luxembourg

I am looking to get a new Mazda3 hatchback in Luxembourg and was at the dealer over the weekend to chat on this They have a Centre-Line in stock with a Design pack. I am not very much keen on the Design Pack but I would be interested in the 'Driver assistance & sound pack'.

I have couple of questions on this driver assistance & sound pack. Was hoping folks here could help me -

a) How good is the native front & rear parking assistance. Is the 360 degree camera worth the additional EUR 1,460 design pack?

b) I don't see Blind spot monitoring mentioned in any of the packs or trim levels. Is that just a standard feature available by default?

c) Lane assist - Is this also a standard feature on all trims?

Thanks!