Wheelchair accessible tickets

Hello, I will be travelling from the UK and will be trying to purchase wheelchair accessible tickets for WM41 and wanted to ask if anybody can answer the following:

  1. Do wheelchair accessible tickets go on pre-sale?

  2. Do I have to book these tickets (pre-sale or general sales) by calling or will they be available online? (I attended WM 35 and had to call Ticketmaster but the phonecall cost me £100 and I want to avoid that if I can)

  3. Does anyone have any idea where the wheelchair accessible areas are located in the stadium and how many tickets will be available for wheelchair users? (When I attended WM 35 my view was not very good, I was quite far away from the ring)

Any help is much appreciated,

Thanks in advance!