A production process for flower vases consists of three tasks to be completed in sequence: Shape$------>$Bake $------>$Paint.

The times taken for one vase at each step are $6$ minutes for Shape, $15$ minutes for Bake, and $4$ minutes for Paint.

There are one workstation for Shape, $2$ identical workstations for Bake $($i$.$e$.,2$ units can be baked simultaneously$),$ and one workstation for Paint.

A$.$ Based on the information provided, what is the hourly capacity rate of each activity