$1.$ Suppose we have two implementations of the same instruction set architecture $($ISA$).$ For some program: machine A has a clock cycle time of $10$ns and a CPI of $2\mathrm{.}0,$ machine B has a clock cycle time of $20$ns and a CPI of $1\mathrm{.}2.$ Which machine is faster for this program, and by how much? $(5)2.$ Suppose a machine$-$ M$1$ contains same instruction set. The following given table contains information regarding four classes of instructions $($R$-$type, Load, Store and Branch$)$ with their average number of cycles and frequency.$(5)$