What does the graph tells? S= are the seconds consume in drawing using (skilled hand) U= sre the seconds consume in drawing using (unskilled hand) thank you.

7 6.756-62 6 5 66 563 5.85 521 UT 4.994-924-92 954.87 4.9 4.60 20 26 4 SECONDS W N P O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 TRIALS SUBJECT 1 TRIAL ERRORS TIME TRIAL ERRORS TIME TRIALS ERRORS TIME 10 6.72 95 4.87 17S 5.56 2U 6.62 10S 5.31 185 4.47 30 6.3 115 4.60 195 4.26 4U 5.25 125 4.28 20U 5.53 5S 4.9 13S 4.20 210 4.99 65 4.92 145 4.98 220 4.60 75 4.92 15S 4.47 230 4.13 85 4.73 16S 4.8