Ir and er ending verbs are very similar in their enemies when they are conjugated how did it differ in their endings when they are contiguous

Ican't figure out these 2 questions, i am very bad at learning new languages! > _< 1. read and choose the correct verb conjugation to complete the sentence. la recepcionista de la escuela y yo somos amigos. nosotros a los padres de los estudiantes. a. contestáis b. contestamos c. contesto d. contesta 2. read and choose the option with the correct verb conjugations to complete the sentences. la vendedora rosa y el arquitecto jordi en buenos aires. soy juan y el presupuesto a rosa y jordi para comprar un chalé. a. viven; presentamos b. vivo; presento c. viven; presento d. vivo; presentamos