(a) Experiment with starting processes in the background, managing those processes, and changing the priority:
remove the echo commands from the looper script
start this script in the background by using the & (example: ./looper & )
use the jobs (note the job ID with the jobs command) and ps
move it to the foreground using the fg command followed by the job number, use CRTL/Z to stop it and return it to the background using the bg command and then kill the process.
TO HAND IN: Take a screen shot of the last 10 commands in your history for (a) change the priority level of a process
run your looper2 script in the background and note the NICE and PRI levels using the ps –l command issue a renice +15 PID and notice the results
start a process with nice –n 19 with your command (maybe a looper script), notice the results
clean up all of your Zombied and Stopped processes

Working on this program in python 3.7: a year in the modern gregorian calendar consists of 365 days. in reality, the earth takes longer to rotate around the sun. to account for the difference in time, every 4 years, a leap year takes place. a leap year is when a year has 366 days: an extra day, february 29th. the requirements for a given year to be a leap year are: 1) the year must be divisible by 42) if the year is a century year (1700, 1800, the year must be evenly divisible by 400some example leap years are 1600, 1712, and 2016.write a program that takes in a year and determines whether that year is a leap year.ex: if the input is 1712, the output is: 1712 is a leap year. ex: if the input is 1913, the output is: 1913 is not a leap year. your program must define and call the function isleapyear(useryear). the function should return true if the input year is a leap year and false otherwise.

How to launch an app: steps to be successful? launching an app is a great idea, but it’s not that easy as we supposed to think. the majority of mobile applications don’t generate revenue because companies aren’t ready to be competitive. referring to our experience in successfully building and launching apps we hope to you omit these difficulties. we are going to talk about ideas, marketing, testing your product, its development, distribution and support. you will learn 8 product launch stages to succeed.

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