Help will give brainlest

Choose the best spanish equivalent to the phrase. they know the old salesman. conocen al vendedor viejo. saben al vendedor viejo.

My spanish teacher said to make these sentences into "ar" verb conjugations. can someone plz me with that? 1. ellos están en la computadora 2. la chicas están estudia 3. la chicas están hablamos 4. el ojo de el señor es marrón 5. la muchacha es feliz 6. la muchacha cantar

Which of the following would you say to someone who just said " you? " a. lo siento. c. salud. b. con permiso. d. no hay de qué. select the best answer from the choices provided