Continuous-Time System:
a1 = 17, a0 = 5, b1 = 4, b0 = 3, 

Your excitation signal x(t) consists of straight lines connecting these points.
It has been zero up until the first time and is zero after the last time.

t = 1.41599, x(t) = 0
t = 1.41599, x(t) = -15
t = 1.93234, x(t) = -15
t = 1.93234, x(t) = 17
t = 4.24874, x(t) = 17
t = 4.24874, x(t) = -18
t = 5.73122, x(t) = -18
t = 5.73122, x(t) = -8
t = 6.21822, x(t) = -8
t = 6.21822, x(t) = 6
t = 7.68978, x(t) = 6
t = 7.68978, x(t) = 11
t = 8.5928, x(t) = 11
t = 8.5928, x(t) = 0
t = 15.7783, x(t) = 0

Discrete-Time System:
a0 = -19, a1 = 16, b0 = 1, b1 = -1, 
0 <= n < 6,  x[n] = 0
6 <= n < 7,  x[n] = 14
7 <= n < 10,  x[n] = 12
10 <= n < 12,  x[n] = -4
12 <= n < 13,  x[n] = 7
13 <= n < 21,  x[n] = 0

x[n] has been zero up until the first time and is zero after the last time.