Hello!

The purpose of this Q&A board is to ask questions directly related to the online courses.

Unfortunately, I can't answer questions that are not from course materials

because as you can imagine, 

this will soon evolve into a place where students just upload their homework and expect answers. :(

Please refer to the guidelines stated above.

As a one-time thing, I'll answer the questions you asked,

but please refrain from posting questions outside of the courses next time.

1.B / 2.A / 3.A / 4.B / 5.C / 6.A