Question 4 Consider logistic regression (with no bias term) over onedimensional features. That is, consider a model where P(class 1) = 0(9x), where a is the logistic function, 6 6 R, and x 6 1R. Consider the following data: X Y -1 1 1 0 Write down the optimization problem given by logistic regression and express it in the form arg min f (9). BER Find and plot the function f