Use Armstrong's axioms to prove the soundness of the pseudotransitivity rule. II. Consider the relation schema R = (N, Y, P, M, C) and assume that the following set of functional dependencies holds on R: F = { N → M, NY → P, M → C}
The letters can be interpreted as follows: R = (Model_Number, Year, Price, Manufacturing_Plant, Color).
Evaluate each of the following as a candidate key for R, giving reasons why it can or cannot be a key: N, NY, NC.
Find all the candidate keys of R.
Show that the functional dependency NY → P does not contain extraneous attributes.
Show that F is already in canonical cover form.
Consider the decomposition d = (R1, R2) where R1 = (N, Y, P) and R2 = (N, M, C). Is this decomposition lossless-join? Make sure to justify your answer and to show all details.

Write a function processpeople() that takes the name of a file as a parameter. each line of the file corresponds to information about a person. in particular a line contains either a name (in the form lastname,firstname with no spaces in it) or a name (lastname,firstname) and a year. the function will process the file, creating a person object for each line in the file. the function will print information about each line as it processes it, as well as appending the new person object into a list. make sure to use person methods to display information rather than recreating the work you did for the first problem. once the entire file has been processed, the function returns the list of person objects created from the file. if the file is empty, the function should return an empty list. if the input file cannot be opened, the function should print a message to that effect and then return an empty list. the following shows what would be displayed for two example files which have been provided in the link. the file none.txt does not exist. note that your function must work on an arbitrary file that consists of valid lines. you cannot assume anything about the file except that it contains lines that have the format described above.

Business professionals of america, and future business leaders of america – phi beta lambda are both open to business students at which levels? check all that apply. elementary school middle school high school college

What is used to analyze and summarize your data without graphical support