Basics $-$ Answer only $5$ of the questions below. Otherwise, first $5$ answer will be accounted. $(30$p$)$

a$.$ What is the main difference between Harvard and Von$-$Neuman architectures. Which processors in the lab use Von$-$Neuman Architecture? $($KLO$1)(6$p$)$

b$.$ Why do we need to use an MCU instead of MPU? $($KLO$1)(6$p$)$

c$.$ Which condition do a stack overflow happen? $($KLO$1)(6$p$)$

d$.$ What are the $2$ hardware basic blocks of a microarchitecture? $($KLO$1)(6$p$)$

e$.$ If we don't use an OS$,$ what other methods are used for program scheduling in an MCU firmware? $($KLO$1)(6$p$)$

f$.$ Why do we use ADC peripheral in an MCU? What does number of bits in an ADC mean? $($KLO$1)(6$p$)$