====== Assignment 1 ======

From the textbook Chapter 1: Signals

  * Q1.2 (ii), (iv), (vi) use Matlab to sketch signals
  * Q1.3 (ii), (iv), (v) use Matlab to sketch signals
  * Q1.5 (i), (iv), (vii)
  * Q1.6 (ii), (iii), (vi)
  * Q1.10
  * Q1.31