What is an ARM processor? ARM's Thumb instruction set allows for both $16$bit and $32-$bit instructions. Discuss how this dual instruction set affects performance and code density in embedded systems. Provide a detailed analysis of when it is advantageous to use Thumb over the regular $32-$bit ARM instruction set.

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$2.$ ARM processors are designed with power efficiency in mind, making them suitable for mobile and embedded devices. Explain how specific ARM features, contribute to reduced power consumption. Provide examples of how these features improve energy efficiency $1$ mark

$3.$ What is MIPS? MIPS is known for its simplicity, particularly in its fixed$-$length instruction set. Analyse how the fixed $32-$bit instruction length in MIPS simplifies instruction decoding and pipeline design. Contrast this with architectures that support variable$-$length instructions in terms of pipeline efficiency and performance.

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$4.$ Compare ARM with MIPS

$5.$ Explain ISA of MIPS

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