The hypothetical MINE instruction set was implemented using a $400-$MHz machine. The

MINE instruction set has three classes of instructions called R$,$ J and I. The implementation

uses $4$ clock cycles for R$-$class instructions, $3$ clock cycles for J$-$class instructions, and $2$

clock cycles for I$-$class instructions. Two software vendors provided compilers for this

machine. For the same benchmark C program, the compilers generated the following

instructions and classes. $($All numbers are in millions of instructions