$1-3)$ Which outputs of the magnitude comparator are used?

$4-6)$ Which datapath output is needed to support the comparison tot $<$ S$?$

$7-9)$ If the HLSM is in state DispSoda, tot is $100,$ and S is $100,$ what is the next state?

$10-12)$ In state DispChange, instead of detecting change $=1,$ if the HLSM is modified to compute the change value, which components need to be added to the datapath? Data operation in state DispChange: CVal $=$ tot $-$ S