Let ω = x²dx ∧ dy − 5ydy ∧ dz be a 2-form in R⁴. Calculate ω(p)(v₁, v₂), where p= (−1,2−3,7) and v₁ = ⟨1,0,−1,0⟩, v₂ = ⟨5,1,−1,1⟩