Stop using right hand rule, use LEFT FIST RULE. And remember, your thumb is always in your fist covered by your four fingers.
I decide to turn license from `CC BY-NC-SA` to `CC BY` (4.0)
Calculus II, special thanks to professor [Wenzheng Shi](https://sites.google.com/view/wenzhengshi/) who provided me with excellent exercises!
Using Verb and Logic to read a passage