For these problems, you will need to know the forms of subject pronouns. I will provide a list. Yo - o, tú - as, él/ella/usted - a, nosotros(as) - amos, ellos(as)/ustedes - an. With this information, you will be able to transform your AR verbs into correct conjugations in the sentences. For example, in the first question, it states the subject Paula. In the sentence, you can classify her as "she" and nothing else. From the information above, when something is shown as "she" (ella) then you use a at the end of an ar verb. So you would change preparar to prepara since we are are talking about "ella." If you have any questions about the other problems, don't hesitate to ask.
