Sales volume of the Saturday edition of the Daily Express paper is much higher than other days, due to the large number of casual reader sales. Casual Saturday edition sales are normally distributed with a mean of 30,000 and a standard deviation of 3000 copies sold. The Daily Express tries to meet demand and avoid running out of printed papers. On a randomly chosen Saturday, Ignoring the continuity correction: a. What is the probability that there are more than 35,000 casual reader sales?
b. What is the probability that there are less than 33,000 casual reader sales?
c. How many Saturday papers should the Daily Express print so that it has only a 5% likelihood of running out?

You have a linux system that has a 1000gb hard disk drive, which has a 90gb partition containing an ext4 filesystem mounted to the / directory and a 4gb swap partition. currently, this linux system is only used by a few users for storing small files; however, the department manager wants to upgrade this system and use it to run a database application that will be used by 100 users. the database application and the associated data will take up over 200gb of hard disk space. in addition, these 100 users will store their personal files on the hard disk of the system. each user must have a maximum of 5gb of storage space. the department manager has made it very clear that this system must not exhibit any downtime as a result of hard disk errors. how much hard disk space will you require, and what partitions would you need to ensure that the system will perform as needed? where would these partitions be mounted? what quotas would you implement? what commands would you need to run and what entries to /etc/fstab would you need to create? justify your answers.