(a) Use a schematic capture tool (which can be downloaded from the Internet; for example, from www.altera.com) to draw schematics for the following functions
f₁ = x₂x₃x₄ + x₁x₂x₄ + x₁x₂x₃ + x₁x₂x₃
f₂ = x₂x₄ + x₁x₂ + x₂x₃
(b) Use functional simulation to prove that f₁ = f₂.