Answer:
1.) Nosotras estamos muy ocupadas. "We are very busy." (Feminine)
2.) ¿De dónde eres usted? "Where are you from?" (Polite)
3.) Esos señores son españoles. "Those men are Spanish."
Ser is permanent and can't be changed, however there are some exceptions... estar is something that can be changed and is only temporary.
