In Bash, inserting "1>&2" after a command redirects

Which of the following commands would display the lines containing capital letters form the file "turkey.txt"?

You want to the command foo to take its input from the file foobar and send its output to the
program bar. Which of the following command lines will do this?

What does the following command do? cat ‘$TEST’

You want to search the file myfile for all occurances of string containing at least five characters, where character number 2 and 5 are ‘a’ and character number 3 is NOT ‘b’. Which command would you use?

You have a text file with tab-separated values, but your application needs them space-separated.
What command would you use from the Bash shell to achieve this? Please fill in the command
only, without any options.

What command returns the first few lines of a given file?

You wish to send the output of a command to standard output (stdout) and save it to a file. The
command to use is ______________. (Do not specify arguments)

What program would you use to increase or decrease the priority of a command before it is
executed?

You wish to execute two commands, one after the other. However, you only want the second
command to execute if the first is successful. Which character(s) do you put between the
commands on the command line to accomplish this?