PLEASE HURRY!!! WILL GIVE BRAINLIEST AND WORTH MANY POINTS!! Read this short paragraph.

Spongebob notices that his pal Gary is suffering from slimotosis, which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr. Kelp will be a better cure. Spongebob decides to test this cure by rubbing Gary with seaweed for 1 week and having
him drink Dr. Kelp. After a week of treatment, the slime is gone and Gary’s shell smells better.

What was the initial observation?
What is the independent variable?
What is the dependent variable?
What should Spongebob’s conclusion be?