Nora, what do you want to do this afternoon?
I'm not very good at Spanish so please do not make fun of me or hate on my answer
Answer:
Talking about myself - Yo
Talking to you - tú
Talking to you (Mr. Smith) - Usted
Lisa, Maggie y tu - Ustedes
Isabella - Ella
Roberto- El
Roberto, Carlos, Andrea y Lisa - Ellos
Lisa, Maria, Ashley, y Brianna - Ellas
Lisa, Maggia, Ling y yo - Nosotros