Mention $2$ factors $($maximum $3$ words for each$)$ that influenced the quality of recorded audio

$2.$ Mention $2$ factors $($maximum $3$ words for each$)$ that affected the recorded file sizes.

$3.$ Calculate the expected uncompressed file size in kilobytes of a $2-$channel, $40-$second audio

recording sampled at $44\mathrm{.}1$ kHz and encoded with $16$ bits per sample. Show your calculation.