Thank you for your query,
Your child seemd to have a upper respiratory tract
infection could be a viral or bacterial.
every 6 th hourly depending on the presence of fever and if there is high grade fever you do tepid sponging with lukewarm water after Tylenol.
Give plenty of oral fluids to maintain hydration.
Consult your Pediatrician
in the morning as early as possible for the examination to detect the focus of infection and for the specific treatment.
For your younger daughter for cough you can give mucolytic
cough drops in prescribed dosage after consulting your doctor.
Hope i have answered your query.