What would the answers be for these three?

El monte aconcagua,en argentina,mode 6,960 metros de altura .la península valdés ,en argentina ,está a 40 metros bajo el nivel del mar.¿cual es la diferencia en metros,de elevación entre estos dos lugares?

Con quien _ (asistir) manuela el concierto?

Question 6 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. yo pago answer for blank 1: question 7 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. yo mando answer for blank 1: question 8 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. miguel y ana llegan answer for blank 1: question 9 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. ustedes lavan answer for blank 1: question 10 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. tú lavas answer for blank 1: