signals and systems

Question 1 (30%): The signal /(t) is shown below: f (t) 7-6-5 -4 -32 -1 Determine the following a) (6%) Find an expression for the signal f(t) b) (6%) Is this signal periodic or aperiodic or non of these? If it is periodic, what is its fundamental period? Fully justify your answer. c) (6%) Is this signal an even signal, or an odd signal? Fully justify your answer. d) (6%) Sketch f(t/2). e) (6%) Sketch f(1-2t)