What does the graph tells? the one who has lowest consume seconds was drawn by S= skilled hand while the higheast consume is U= unskilled hand. Thank you

5.19.0940 SM7 561 SECONDS 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 TRIAL ERROR TIME TRIAL ERROR TIME TRIAL ERROR TIME 15 6.48 95 4.20 175 4.92 25 6.80 105 5.62 185 4. 23 35 6.09 1 15 5-40 195 3.73 4U 7.45 125 5.40 205 4.47 50 5.15 135 4.10 215 5.29 6U 5.05 145 3.71 225 6.01 7U 5.10 155 5.01 235 5.47 BU 4.43 165 6.59