It is known that a particular type of software test is certain to identify virus X if it has been inserted into a computer system. However, there is also a 5% probability of a false alarm (i. e., there is a 5% the probability that the test will be positive when virus X has not been inserted). You run the test and the outcome is positive. 1. What can you conclude about whether or not the system really is infected with the virus X?
2. How would your answer to (1) change if additionally, it was known that virus X had been inserted into approximately one in every thousand computer systems?
3. Suppose the only known effective fix for virus X costs $250,000 when the full costs of system shutdown and repair are considered. From a risk assessment perspective what action would you recommend you should state any assumptions about additional information needed)?

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.