Program $x$ is run on machines $M1$ and $M2.x$ requires $3,000,000,000$ cycles, $M1$ has a clock frequency of $1\mathrm{.}2GHz,$ and $M2$ has a clock frequency of $1\mathrm{.}4GHz.$ How long does $x$ take on $M1$ and M$2?$ How many times faster is M$2$ than M$1?$