Exercise $6$: Write a program that uses keyboard input $($as the program on the right in Exercise

to evaluate the following formula. The program should use as fewer variables as possible $($pay

attention. There is a pattern in the formula that can be exploited to use only a few variables

instead of many$).$

$(1+\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+\frac{4}{5}{)}^{(\frac{1}{3})}$