Section B: Signal Processing Question 1 Consider the Signal in Figure 6. (1) Figure 6 a) Mathematically describe the signal x(t) [8 Marks] I b) If signal x[t), has been delayed by 3 seconds, mathematically describe the delayed signal [8 Marks) c) Describe causal versus non-causal signals for continuous time. [4 Marks) d) Brietly explain the conditions for a system to be linear-time invariant [5 Marks) [Total 25 Marks)