Answer from cs61c-af (Annie Tran 16811592) for Question 3
I am sort of confused on the loading and storing functions in MIPS.  When load or store a value in a single variable how do you declare it?

is this right?
storing
$s0 is the value.
$s1 is the base address.
sw $s0, $s1

loading 
lw $t0 $s1

and adding constant numbers how is it represent?
by an address to the register or the actual numerical value?