Count object image and calculate the area by class using Google Earth Engine

I have a classification image and I need to count the objects by class size (objects less than 50ha, 50ha to 100ha, 100ha to 500ha, 500ha to 1000, 1000ha to 5000ha, greater than 5000ha) and by class_id. For example, I want to know how many objects I have from Class 1 with size less than 50ha and area from this class.

I have a script almost done, but something is wrong...

https://code.earthengine.google.com/d8271bc9224a9f3fadf42962c2a5a777