a.) A user of Linux operating system wants to make his system as server with many services, user also want his server to make services available to the clients only when asked, what can be the possible solution to do this in Linux, give complete details to achieve this by the user. [4] b.) Give the differences among the following [at least 2 differences] [3] i. MBR and GRUB ii. Formatting and Mounting iii. Main Memory and Swap Memory