Based on the scenario described and the actions of those related to Gain:
Insider trading:
When a company is to be acquired, its shares generally rise in price. Gain must have told his brother that he was trying to acquire RS Communications which was why both his brother and father purchased those shares.
In conclusion, Gain engaged in insider trading because his brother and father bought RS shares knowing they would rise as a result of the confidential information Gain shared with them and a court would hold him liable for this.
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