5. (20%) Let function H(x) =be the Heaviside function. We define the Pulse function as Pa,b (x) = H(x-a)-H(x-b), where a<0<b
(b) (12%) Find the following limits:(i) limx→0Pa,b(x) (ii) limx→a+Pa,b(x) (iii) limx→a-Pa,b(x)