Write a Bash script named addcol.sh that reads a spreadsheet from standard input, adds a column, and writes the result to standard output. The input and output format is a single CSV (comma separated value) file. Each line of the file is a row in the spreadsheet, and columns are separated by commas. The first line of the file contains column headers. The script should take a single command line argument, which is an item name. This will be the name of the column to add to the spreadsheet, and the name of the new column header. The remaining column data should be added as follows. The first column in each row contains a filename, called the key file. If the key file exists, and contains a line of the form item-new column value where item is the item name given on the command line, then "new column value" should be the new column value. Otherwise, the new column value should be the empty string.

What difficulties arise when a computer is only able to store and process integers? We have a problem on our hands. Our dilemma is, "What should we do?"

Explain two major advances in computing history in a few words.

In the JavaScript programming language what are the first and last index positions for an array of size 50? Describe what is meant by "layered software development" and provide an example of it. What is the purpose of ASCII and what is one limitation of it?