Help with script for for a calculation looking at two fields to give a text result
I need help to write a script within my Form.
A = B x C
Risk = Process Medium x Test Pressure

Where:
B, "Process Medium" drop down. This list has multiple options which I have gave each an Event Value
C, "Test Pressure" but:
less than 5 to give event value 1,
greater than 5 but less than 10 to give event value 2,
greater than 10 but less than 15 to give event value 3,
greater than 15 but less than 20 to give event value 5,
greater than 20 but less than 30 to give event value 10,
greater than 30 to give event value 20.
Finally result in "Risk" text box to display:
Low Risk (in green font) if results is less than 9
Medium Risk (in orange font) if result is greater than 9 but less than 20
High Risk (in red font) if results is greater than 20
