dearsirormadam:thepurposeofthisletteristoremendmr.yi,aworthycandidateforadmissiontoyourgraduateprogram.mr.yihaveevertookmycourse\introductiontocontrol\.iwasdeeplyimpressedwitimnotonlythegoodscore\a\hegotintheclassbutalsothehighlyactiveanevoutattitudehelearncontroheory.sometimes,hecametomyofficetoaskmesomeinterestingquestionsaboutthecontrolandsystemtheoriesnotmentionedintheautobiologyofmyclassandto...