Based on our Stack ADT specification, an application programmer has two ways to check for an empty stack. Describe them and discuss when one approach might be preferable to the other approach.

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Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.