Let `k`
be an integer such that the triangle with vertices
`(k ,-3k),(5, k)`
and `(-k ,2)`
has area `28s qdot`
units. Then the orthocentre of this triangle is at the point :
`(1,-3/4)`
(2) `(2,1/2)`
(3) `(2,-1/2)`
(4) `(1,3/4)`
A. `(2,(1)/(2))`
B. `(2,-(1)/(2))`
C. `(1,(3)/4)`
D. `(1,-(3)/4)`