HELP ASAP PLEASE PLEASE PLEASE!!!!

1.What must come after the construction acabar de ?

-a conjugated verb
-an infinitive verb

2.choose the correct conjugation of the verb acabar for the following subject pronoun.

ella
-acabo
-acaba
-acabamos
-acabáis

3.choose the sentence that is grammatically CORRECT.
A.
-Voy comprar comida
-Voy a comprar comida
-Voy a compro comida
B.
-Mi mamá va al zoológico
-Mi mamá val zoológico
-Mi mamá va a el zoológico

4.Choose the correct contraction that is formed form the following words.
a + el
-al
-a el
-ael