Answer:
-12
Step-by-step explanation:
6 times -2 is -12.
_____
"Lowers by 2°" can be represented by an integer of -2.
To subtract vectors, you simply have to subtract correspondent coordinates.
So, if you have

the subtraction is simply

So, in your case, we have

omi god..... I used http://convert-to.com/202/speed-units.html and got
1.64 maybe if u try it would be different idk
Answer A) is the correct option because the rest are wrong. :)