.LTXFIND Design MethodologyBThe design of XFIND follows the design of sample routine XGFUNC. KXFIND calls module XGDATA which in turn calls FINDUSER which is called fiveEtimes. Every time XGDATA invokes FINDUSER a flag is sent to FINDUSERHindicating which mode to perform. The 5 modes which are defined below. Mode definitions: 1) Set flag to call XXGSET.1 2) Initialize a sequence, zero out accumulators.7 3) Process a sequence. (Does it meet the constraints?)F 4) End of sequence. Calulate the average for each principle variable requested. 5) End of run..EL