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Why is the chart showing two bar only while we are plotting six values on the chart ? a=[4,8,2,6,9,12] b=[20,30,40,50,60,70] plt.xlim(-1,5) plt.bar(a,b) plt.show() 9. Write a python code to display a bar chart of the number of students in a class. Use different colors for each bar . ................
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