how to create new options of "dd command" using bash script?

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http://www.unix.com – Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Creating bash script the dd command and its new options (-l -U) -l options to lowercase contents of file -U options to UPPERCASE contents of file in such a way that when it invokes the Code: dd -U if=test of=test.bak then the output of contents of file will become UPPERCASE or vise versa in the -l options 2. Relevant commands, code, scripts, algorithms: Sample: vi test and press Enter Code: # (HowTos)