Implement `should_send_notifications(user_id, timestamp) -> bool`. You are given two mappings: - each `user_id` belongs to exactly one `team_id` - each `team_id` belongs to exactly one `company_id` A notification attempt made by `user_id` at `timestamp` should be **allowed** only if accepting it would keep all of the following sliding-window limits satisfied over the previous 10 minutes: - a user may send at most **3** notifications - a team may send at most **10** notifications - a company may send at most **20** notifications If the request is allowed, it must immediately count toward the user, team, and company limits. If it is denied, it must not be recorded. Assume timestamps are integer seconds and calls arrive in non-decreasing timestamp order. Be prepared to walk through real test cases and explain the time and space complexity of your approach.