Answer:
Well, technically, no *SUBJECTS* have stem changes, *VERBS* do.
answer > nosotros (1st person plural)
Explanation:
01: B
02: C
03: A
04: D
The definition of the images is:
A. I am John and I am blonde.
B. I am Esteban and I have brown hair.
C. You are Estelle. You are a red head.
D. My name is Susan and I am short.
The translation is: I am going to a concert tonight. What time? (or what i think it is)
for this answer just put down a time like: a las ocho de la noche
hope this helped! (: