Calculate the growth function mH(N) for the following classes of classifiers: (a) The set of classifiers on R that can be written as either h(x) = sign(x − a) for some a ∈ R or h(x) = −sign(x − a) for some a ∈ R, i. e., the set of both positive and negative rays. (b) The set of classifiers on R that can be written as either h(x) = { +1 if x ∈ [a, b] −1 else or { −1 if x ∈ [a, b] +1 else (1) for some a < b ∈ R, i. e., the set of both positive and negative intervals.