There is no way to know if we're supposed to give singular or plural commands. This should be indicated in parentheses.
It would still be Jibu vizuri. Vizuri is one of many adverbs that are formed from vi- + (adjective). The prefix doesn't have anything to do with the number or class of the sentence's subject.
So what your saying is that when you turn an adjective into an adverb, you add vi- the beginning, and it has nothing to do with the ki/vi class?
Am I understanding this correctly if I say that this is plural and singular would be Jibu vizuri?
yes I got it now... Before we studied adjectives and they change their beginning letter(s) according to the nounclass of the noun they describe. Here now we are dealing with an adverb. An adverb determines how a verb is done (quickly, slowly, badly...) Verbs are not in the noun classes of course, so they don't change their form. As I understand by now (but this has to be evaluated) most of them start with v
vizuri - well
vibaya - badly
(however there are
baadaye - later
salama - peacefully)
haraka - quickly