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Qualitative Analysis. Let x(t) for t≥ 0 be the solution to the differential equation dx dt = 2 cos(2x(t)) - 1, satisfying x(0) = 2. Without solving the differential equation answer the following with justification. (a) Identify the intervals of increase/decrease of the solution x(t). (b) Identify the intervals of concavity/convexity of the solution x(t). (c) Identify the limiting value of x(t) as t → +∞, if it exists. (d) Sketch a graph of the solution x(t).