b$)$ In a microcontroller system, the scheme of $2\text{'}$s complement number which has the property of

'additive inverse' is used to represent negative decimal values. In each case below, express the

signed $16-$bit value of $N$ in binary, hex, and decimal:

i

ii$)N=0{5555}^{0}xFFFF$

$(6$ marks$)$

c$)$ What are the instruction types in ARM Cortex$-$M instruction set? A format of $16-$bit machine

code is shown in Figure Q$5$a$.$ Consider a machine code of an instruction is $\text{'}03FC3\text{'}.$ What is the

instruction represented by this machine code?

$(4$ marks$)$

Figure Q$5$a: A machine code format for ARM instructions.