Marta y yo compramos unos guantes. (for them) question 4 with 1 blanklos vendedores venden ropa. (to you, fam. sing.) question 5 with 1 blankla dependienta muestra los guantes. (to us)

Marta y yo les compramos unos guantes.

Los vendedores te venden ropa.

La dependienta nos muestra los guantes.

Explanation:

The indirect object or indirect complement is a syntactic constituent governed by a transitive verb, generally not obligatory, whose semantic interpretation or designated referent is a receiver, benefactor or goal of the action expressed by the verb.

The indirect object is the person or object on which the action of the verb falls indirectly, it is also said that it receives the benefit or damage of the action of the verb. It is a predicate modifier. The indirect object can be presented in a sentence like the pronouns “le” or “les”.