Continuous-Time System:
a1 = 5, a0 = 18, b1 = 3, b0 = -5, 

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 = 5.69657, x(t) = 0
t = 5.69657, x(t) = -12
t = 5.98389, x(t) = -12
t = 5.98389, x(t) = 12
t = 6.29227, x(t) = 12
t = 6.29227, x(t) = 8
t = 6.78598, x(t) = 8
t = 6.78598, x(t) = 2
t = 7.61395, x(t) = 2
t = 7.61395, x(t) = -0
t = 8.75785, x(t) = -0
t = 8.75785, x(t) = 0
t = 15.1455, x(t) = 0

Discrete-Time System:
a0 = 11, a1 = 10, b0 = -10, b1 = -42, 
0 <= n < 8,  x[n] = 0
8 <= n < 12,  x[n] = 12
12 <= n < 14,  x[n] = 4
14 <= n < 17,  x[n] = 5
17 <= n < 18,  x[n] = 27
18 <= n < 19,  x[n] = 6
19 <= n < 32,  x[n] = 0

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