Answer:
Regulatory
Step-by-step explanation:
the rectangular sign with longer vertical dimension and have white background are called regulatory signs.
regulatory signs are those signals which are used to indicate or reinforce traffic laws.
these regulatory sign informs the driver and tell them to apply the traffic law at certain required places.
Answer:
B. 
Step-by-step explanation:
GIven that
and
, and that point M is the midpoint of AB, the midpoint can be determined as a vectorial sum of A and B. That is:

The location of B is now determined after algebraic handling:


Then:




Which corresponds to option B.