Please carefully review the notation for negative signs. a) Estimate the limit of lim 1 if it exists, by using a calculator to generate a table of T values. . Use five or more values . Justify your choice of values 1- 2 b) Estimate the limit of lim 245+ r(x- 5)' if it exists, by using a mathematical argument/justification that does not use a table of values. Your short explanation should include . the type of values you considered for the limit . how the values help you deduce the limit