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.

8 45 6.48 6.29 6 6.09 601 UT 5.15.05.10 563 46.40 529 5.47 501 4.97 4 49 20 4 47 4.10 4.23 SECONDS 3:41 3.73 W N 0 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 2 TRIAL ERROR TIME TRIAL ERROR TIME TRIAL ERROR TIME 10 6.48 95 4.20 17S 4.92 2U 6.80 10S 5.62 185 4.23 3U 6.09 115 5.40 195 3.73 4U 7.45 125 5.40 20S 4.47 5S 5.15 135 4.10 210 5.29 65 5.05 14S 3.71 220 6.01 75 5.10 15S 5.01 230 5.47 85 4.43 165 6.59