Consider the following forcing function. (A computer algebra system is recommended.) f(t) = [us(t)(t - 5) - U5+k(t)(t - 5 - k)]/k. (a) Sketch the graph of f(t). f(t) f(t) 1.0 1.0 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 t t O 2 4 6 8 10 12 O 2 4 6 8 10 12 f(t) f(t) 1.0 1.0 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 ut 12 ut 12 8 10 2 4 O 6 8 10 2 4 6 Screenshot Describe how it depends on k. The value of k controls the point at which f(t) reaches 1 For what value of k is f(t) identical to g(t), where g(t) is defined as follows? o, Ost