$=$ MOD$($SN$,10)$

M $=$ MOD$($SN$,20)$

S $=$ Sum$($Last $3$ digits of SN$)$

$1.$ a$)$ How much memory is needed to store N minutes of uncompressed music using the following format? Show your work. $(1)$

$48000$ samples per second $-$

$32-$bit floating point samples $-$

$$ M$-$channel surround sound $("5\mathrm{.}1")$

$1.$ b$)$ How much memory is needed after converting to AAC compressed format using a compression ratio of S:$1?(1)$

$2.$ Do the calculation of Nd $-$ Na$,$ unsigned $2\text{'}$s complement, N $-$ MOD$($SN$,40).$ You should show your steps. $(1)$

$3.$ Write a quadratic equation