Hi, I need help on these spanish questions {YOU CAN GAIN LOTS OF POINTS!}

Fill in the blank with the form of ser you would use with the following:
Tú__________bajo.

Fill in the blank with the form of ser you would use with the following:
Tú__________bonita.

Fill in the blank with the form of ser you would use with the following:
Ellas __________listas.


Una pluma es _____________.

un bolígrafo
una ventana
un papel
un ordenador

Rosa saca __________.

buenas notas
el arte
los meses
ellos

Pls answer without translators and asap. Thank you.