$1\mathrm{.}1$ Explain the differences between a revision and a variation for software versions. $(5)$

$1\mathrm{.}2$ List and briefly explain $3$ strengths and $2$ weaknesses of design patterns. $(5)$

$1\mathrm{.}3$ Briefly explain the $$triple constraints$$ of project management and list who manages them. $(5)$

$1\mathrm{.}4$ Explain the duty of the SQA group and the need for managerial independence. $(5)$