Write the following two methods: computeDiameter: This method accepts the radius (r) of a circle, and returns its diameter (2*r; radius = 7.5). Declare all variables used here & initialize radius:...

1. Write the following two methods:

• computeDiameter: This method accepts the radius (r) of a circle, and returns its diameter (2*r; radius = 7.5).

Declare all variables used here & initialize radius:

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Write method code here:

1. displayData: This method accepts two arguments: radius & diameter.  The output should have appropriate messages on the screen.

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Write method code here: