Read the quote below and answer the questions that follow:

Bill Gates: "When Paul Allen and I started Microsoft over $30$ years ago, we had big dreams about software. We had dreams about the impact it could have. We talked about a computer on every desk and in every home. It's been amazing to see so much of that dream become a reality and touch so many lives. I never imagined what an incredible and important company would spring from those original ideas."

$1\mathrm{.}1.$

Discuss the relationship between software and hardware. $(5)$

$1\mathrm{.}2.$ Investigate the reasons as to why almost every home and organisation use computer systems. $(10)$

$1\mathrm{.}3.$ Microsoft developed MS DOS and Microsoft Windows operating systems. Analyse the differences between the two operating systems and state which one is more widely used and why?