2a. If the user enters an invalid operator, output a message telling the user the input is invalid and re-prompt the user for the operation again. Sample Output for Scientific mode: Enter '+' for addition, '-' for subtractions, '*' for multiplication, '/' for division, 'sin' for sin x, 'cos' for cos x, 'tan' for tan x: division Invalid operator division Enter '+' for addition, '-' for subtractions, '*' for multiplication, '/' for division, 'sin' for sin x, 'cos' for cos x, 'tan' for tan x: +

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A:

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Q: What kinds of characters and strings may you use in Java?

A: Answer is in next step.

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A: In this case, we have to choose the right option from the given list of options.

Max Function

Statistical function is of many categories. One of them is a MAX function. The MAX function returns the largest value from the list of arguments passed to it. MAX function always ignores the empty cells when performing the calculation.

Power Function

A power function is a type of single-term function. Its definition states that it is a variable containing a base value raised to a constant value acting as an exponent. This variable may also have a coefficient. For instance, the area of a circle can be given as: