What are the most important changes we do when turn direct speech into reported speech? And how do we report questions and commands?

To convert direct speech to reported speech, we must change all the present tenses in the direct speech to the corresponding past tenses in the reported speech and to report questions and commands use a reporting verb like request, order, tell, advise, beseech, threaten, beg, implore, ask, propose and forbid. Note that all of these verbs except propose must be followed by an object. Commands and requests are usually reported using a to-infinitive. That-clauses can also be used.

b. failure at least that one seems the most negative out of all of the answers provided pls correct me if i'm wrong. : ))