22. (a) From its graph, we see the maximum height of the tent map occurs at x = 1/2, hence is s/2.

(b) From its graph, the nonzero fixed point occurs to the right of x = 1/2. Consequently, it is a solution of x = s - sx. (Recall equation (2): xn+1 = s*(1 - xn) for xn > 1/2.) Solving for x gives the value xf = s/(1 + s).

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