The ordinates of three unit hydrographs derived from separate storms of $4-$hour rains each are as follows:

$\backslash$table$[[$Hours$,$Storm $1,$Storm $2,$Storm $3,$Hours,Storm $1,$Storm $2,$Storm $3],[0,0,0,0,8,135,165,214],[1,115,20,16,9,100,125,164],[2,370,120,57,10,70,85,121],[3,505,353,173,11,45,55,90],[4,395,460,335,12,27,30,60],[5,315,400,442,13,15,15,35],[6,240,300,400,14,10,3,16],[7,175,215,283,15,0,0,0]]$

Find the average unit hydrograph.