Required: Assume a traditional tax shelter Spreadsheet $21\mathrm{.}6,$ calculate the effects of an increase of $\backslash (1\backslash \%\backslash )$ in the lowest tax bracket to an increase of $\backslash (1\backslash \%\backslash )$ in the highest tax bracket.SPREADSHEET $\backslash (21\mathrm{.}6\backslash )$ Saving with a progressive tax