HELP!! Impulse Response h(n) problem Please help me solve this problem. Atleast the correct answer indication is also very much appreciated. A system has impulse response h(n) = (1/2)^n-3 U(n-3) and the input is x(n) = 3^n U(n) a)Find the output by direct convolution. b)Find the output by using z-transforms. Thanks for your kindness, time and effort.