Necesito ayuda con estos dos ejercicios de Francés, alguien me puede brindar sus conocimientos?

Any french speakers? i need some . how would i say 'my oldest brother is very tall, interesting, and good at drawinng.' in french? would it be: mon (i don't know the french word for oldest) frère est très grand, intéressant, et bon à dessin. also, how would i say 'my dad is good at his work' in french?

Sac est sur la chaise? (your formal)

Picking brainliest true or false? "de temps en temps" goes at the end of the sentence.