Enable text based alternatives for graph display and drawing entry

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[Graphs generated by this script: setBorder(47,40,20,5); initPicture(0,25,0,9);axes(1000,2,1,1000,2); fill="blue"; textabs([165,0],"data","above");line([1,-0.18],[1,0.18]); text([1,0],"1","below");line([5,-0.18],[5,0.18]); text([5,0],"5","below");line([9,-0.18],[9,0.18]); text([9,0],"9","below");line([13,-0.18],[13,0.18]); text([13,0],"13","below");line([17,-0.18],[17,0.18]); text([17,0],"17","below");line([21,-0.18],[21,0.18]); text([21,0],"21","below");line([25,-0.18],[25,0.18]); text([25,0],"25","below");textabs([0,115],"Frequency","right",90);rect([1,0],[5,6]);rect([5,0],[9,8]);rect([9,0],[13,3]);rect([13,0],[17,9]);rect([17,0],[21,2]);rect([21,0],[25,7]);]

Based on the histogram above, what is the class width?

Class width =

What is the sample size?

Sample size =