Ineed with spanish and someone that can answer quickly?

Which verb phrase correctly completes this sentence? ana y julia en el mar. a. están nadando b. estamos nadando c. estás nadando d. estoy nadando

Use the right ser, or ir conjugation.

(05.02 mc)  read the sentences. choose the option with the correct pronoun that would replace the part in  boldand the missing pronoun in the last sentence.soy gustavo  y tengo el pelo gris y uso lentes. señora lourdes, es canosa también.