La rutina de rodrigo y su familia I need the answers

Which one of the following is a trick used in spanish to identify the right hand? touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase b is your mano derecha. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano izquierda. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano derecha.

Which verb correctly completes this sentence? natalia a mis hermanas. a. conoce b. sabe c. conocen d. saben

How might someone answer the following question? ¿cuándo vamos a la biblioteca? a)voy el martes. b)vas el martes. c)vamos el martes. d)va el martes.