Answer:
The coordinates of B' and C' are  and
 and  , respectively.
, respectively.
Step-by-step explanation:
From the Linear Algebra, we define the translation of a given point as:
 (1)
 (1)
Where:
 - Original point, dimensionless.
 - Original point, dimensionless.
 - Translation vector, dimensionless.
 - Translation vector, dimensionless.
 - Translated point, dimensionless.
 - Translated point, dimensionless.
If we know that  and
 and  , then the translation vector is:
, then the translation vector is:
 (2)
 (2)


If we know that  ,
,  and
 and  , then the translated points are, respectively:
, then the translated points are, respectively:
 (3)
 (3)



 
 

The coordinates of B' and C' are  and
 and  , respectively.
, respectively.