We know that RAM is much faster than other secondary storage devices like Hard Disks. This is because the technologies used to build RAMs is different than those used to build secondary storage devices. Since RAM is very fast, would it not be better if we create very large RAMS (for example a 500GB RAM) and use it as secondary storage instead of a hard disk to make the computer faster? What are some reasons that would stop us from doing this? List at least 2 reasons.