Question: URGENT HELP a) Write a statement that defines a variable length of type double and reads its value from the input using a predefined Scanner

URGENT HELP URGENT HELP a) Write a statement that defines a variable length of

a) Write a statement that defines a variable length of type double and reads its value from the input using a predefined Scanner object named input b) Which of the following identifiers are valid? Which are Java keywords? miles, Test, a++, --a, 4#R, $4, #44, apps class, public, int, x, y, radius

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