Calculator_class - Solve a Problem

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What might be the state (data attributes) of your class? (Check all that apply.)
All of the operators the calculator has, such as +, -, *, and /. The number that has just been computed. Another number that is currently being input. The maximum supported digit value the calculator supports (9). Whether the calculator is in simple or scientific mode. The functionality to compute a sum or product. A memory feature to remember a previously computed value for recall later. Images for the graphical user interface to display the calculator.
What might be the behavior (methods) of your class? (Check all that apply.)
A flip method to turn the calculator text upside-down. Exponentiation and logarithms. A method to switch modes between simple and scientific. A method to draw the calculator on a graphical user interface. A calculate method that performs whatever calculation the user is thinking of. Methods to add, subtract, multiply, and divide. A clear method to wipe out the previously calculated values. Trigonometric operations like sine and cosine. (order shuffled)