Estan Caminando isn't the answer as because "estan" implies to be another person, but this isn't the case as it's only the man, the man isn't walking (caminando either)
He isn't shopping (comprando) and he isn't painting (pintando)
The only logical answer is he's cooking (cocinando) which is also heavily implied as him having the bowl and whisk
B.) Esta Cocinando is your answer
The answer is Veo you can trust me i speak Spanish. Hope it helped.
Voy a pagar con dinero en efectivo
The sentence is incorrect because of the words dorms and Queen .
The correct sentence is Es importante que duermas un poco antes de la excursión.
Hope this helps and have a wonderful day!