Clarify questions in basic

[rishsriv]

Made 2 changes:

In the question Who were the top 3 sales representatives by total revenue in the past 3 months, inclusive of today's date? Return their first name, last name, total number of sales and total revenue., revenue could have conceivably referred to both the sum of sale_pricein the sales table, and the sum of payment_amount in the payments_received table. Made this more explicit in the question

In the question Return the distinct list of merchant IDs that have received money from a transaction. Include all transaction types in the results you return. - the person reading thing could conceivably think that they must include the transaction_type column in the results as well. So made the question clearer.

[wongjingping]

Good catch on the revenue definition, thanks for the clarifications!

[wendy-aw]

Thanks for this! Lemme change the questions too in the dialect files