1) decides the following sentence is correctly conjugated in the imperative (mandato).

comes mucho.

incorrecto
correcto

2)decide whether the verb underlined in the next sentence would be in the indicative mode or the subjunctive mode.
she said i need to bring this

The answer is: Incorrect and Indicative mode.

Explanation:

Comes mucho no es un imperativo, sino un presente de indicativo, por lo tanto es INCORRECTO.

El imperativo sería, Come mucho.

2) El verbo Decir, en la forma DIJO corresponde al pretérito perfecto simple de indicativo.

La respuesta es: Incorrecto y Modo indicativo.

You eat a lot is not an imperative, but an indicative present, therefore it is INCORRECT.  

The imperative would be, Eat a lot.

2) The verb Say, in the form SAID corresponds to the past perfect simple indicative.

The answer is: Incorrect and Indicative mode.