The vector in the opposite direction to vecv = ⟨ 3, -5 ⟩ and of half its length is:
a) ⟨ -1.5, 2.5 ⟩
b) ⟨ -3, 5 ⟩
c) ⟨ 1.5, -2.5 ⟩
d) ⟨ -6, 10 ⟩