Lesson 22 Step Functions: Problem 7 Previous Problem Problem List Next Problem (1 point) The graph of f(t) is given below: (Click on graph to enlarge) a. Represent f(t) using a combination of Heaviside step functions. Use h(t - a) for the Heaviside function shifted a units horizontally. f(t) = (2t-4)h(t-2)+(2t-12)h(t-6)-8h(t-9) help (formulas) b. Find the Laplace transform F(s) = [ {f(t) } for s # 0. F(s) = [ {f(t)} = (2e^(-2s)/s^2)-(2e^(-6s)/s^2)-(8e^(-9s)/s^2) help (formulas)