Consider the XOR function X1 x2fXOR(x) 0 0 0 0 1 1 1 0 1 1 1 0 f(x) = {{ if wTx+b0 (2) 0 if wTx+b0 Prove that XOR can NOT be represented using a linear model with the same form as (2). [Hint: To see why, plot the examples from above in a plane and think about drawing a linear boundary that separates them.]