A: yes, you can do that in Tier 5, you can connect 20 whatsapp numbers. So you will need to get multiple Tier 5s for that many whatsapp accounts. Also follow these as guidelines, while sending messages:-

1. Send utility-focused updates only to users who have opted in. Do not do cold reachout
2. Pace it out. Send less than 150 messages in a day from one whatsapp number
3. Personalise each message (e.g., “Hi Anurag—you’d asked about the Ignite video, so here it is.”).
4. Send helpful content, reminder, confirmation instead of generic promotions.
5. Warm up new numbers before sending messages. Do not use completely brand new whatsapp numbers.