Observe the grid below:

Using the values $of$ a and $b$ obtained

from the grid, compute the area $A$

under the curve $y=x^2$ between $x=a$

and $x=b$ :

$A={\displaystyle \underset{a}{\overset{b}{}}}{x}^{2}dx$

Requirements:

First determine the values $of$ a and

$b$ from the grid

Then calculate the definite integral

using these values

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