Continuous-Time System:
a1 = 16, a0 = 7, b1 = 9, b0 = -9, 

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 = 3.60043, x(t) = 0
t = 3.60043, x(t) = 12
t = 4.98823, x(t) = 12
t = 4.98823, x(t) = -11
t = 5.41603, x(t) = -11
t = 5.41603, x(t) = 11
t = 6.64185, x(t) = 11
t = 6.64185, x(t) = 16
t = 8.01681, x(t) = 16
t = 8.01681, x(t) = 0
t = 15.4754, x(t) = 0

Discrete-Time System:
a0 = 21, a1 = 15, b0 = 33, b1 = 25, 
0 <= n < 4,  x[n] = 0
4 <= n < 6,  x[n] = 2
6 <= n < 8,  x[n] = -5
8 <= n < 9,  x[n] = -4
9 <= n < 10,  x[n] = -1
10 <= n < 27,  x[n] = 0

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