Create a calculator app. When the app is in portrait mode it should provide the user with the ability to calculate basic arithmetic operations $($add$,$ subtract, multiply, divide$)$ When the app is in landscape mode it should provide the user with the ability to perform the aforementioned operations as well a square root $(2$x$),$ n$\text{'}$th root $($n$$x$),$ squaring $($x$^2),$ exponentiation $($x$^$n$),$ log$.$ and the natural log$.$ For simplicity, the calculator should operate using the tabulation approach. This means only one operation is handled at a time. Meaning the user will specify a number then an operation, then another number, and press the equals button. In the event, the equals button is not pressed but another operation button is pressed, the calculator should calculate the preceding value display it on the screen then proceed to use the recently calculated value as the first value of the next operation. The calculator does NOT have to operate like a scientific calculator where all the options are specified then calculated but if you are feeling ambitious try to make it a scientific calculator.