I need help with these please.

3) Two students are revising their Trial balance notes. Their trial balance balances however they later learn that there were errors in it. Explain to them what a Trial Balance is and give them two (2) reasons/limitations why their Trial Balance had errors although it balanced.

4) You saw your classmate, Tom Hum, in an Accounting for Dummies Facebook Group make the following comment under a post:

Debits are on the left and when Liabilities, Revenue and Dividends are debited they increase. Credits are the opposite to Debits and increase the other accounts from the Accounting Equation. You realize that he is trying to explain the use of debits and credit in recording business transactions. What is the correct explanation that you would inbox to him?

6) Paula Alvarez began working with her fathers business, Alvarez & Company, as an Accounts Clerk. The company reports land on its Statement of Financial Position at the amount paid to acquire it, even though the estimated fair value is greater. Identify and describe the principle of accounting the company uses?