Coursera Course 2 IoT specialization Q3 and 4

Any one who attended the coursera course. I would like to have some help regarding Q3&4.
I really didn’t know what they are asking for.
So I post the questions here:

3.Question 3
If I want to use the face recognizer using Circular Local Binary Patterns through OpenCV on images taken on an RGB scale, what method should I call on the image in order to match what the recognizer expects?

4.Question 4
You can run samples for the Google Assistant. How would you run the sample with a file as input and the speaker as output? Be sure to make include in your command as a place holder.
For example command to execute a Python file:

Any Help is appreciated.