Okay so. Ser has many forms of putting it
Yo-Soy
Tu-Eres
El Ella Ud.-Es
Nosotros-Somos
Vosotros- Sois
Ellos Ellas Uds.-Son
I don't know if i answered right.
1. estoy, it explains that she is currently happy
2. es, explains the color of the brush
3. está, location of the brush
4. son, where they’re from
5. it should be están, but bc of the “a” after it confuses me, but it’d explain where they are
The cheese is in the section of dairy and agricultural products.