Write a class named parkingmeter containing: an instance variable named timeleft of type int, initialized to 0. a method named add that accepts an integer parameter. if the value of the parameter is equal to 25, the value of timeleft is increased by 30; otherwise no increase is performed. add returns a boolean value: true if timeleft was increased, false otherwise. a method named tick that accepts no parameters and returns no value. tick decreases the value of timeleft by 1, but only if the value of timeleft is greater than 0. a method named isexpired that accepts no parameters. isexpired returns a boolean value: true if the value of timeleft is equal to 0; false otherwise.

Aisha has finished working on a word processing document that contains 15 pages. she has added some special elements in the first three pages, page 9 and 10, and page 15 from the document. she wants to print only these pages to see how they look. which option is the correct way to represent (in the print dialog box) the pages that aisha wants to print?

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.

You are consulting for a beverage distributor who is interested in determining the benefits it could achieve from implementing new information systems. what will you advise as the first step?