Entering Attributes using the Attribute panel

a. Double click on the ‘Fuel price’ node to open its object window

b. Change the identifier to ‘Price’

c. Type ‘$’ in the ‘Units’ field. Press ‘Tab’ key. In the ‘Description’ field, type ‘price of a gallon of gasoline’.

d. Click the ‘expr’ button. Select ‘Distribution’. The object finder should appear. In the object finder, scroll down, and select ‘Normal’. Type ‘1.19 and 0.1’, in the ‘mean and sttdev’ window. Click ‘ok’. Now the definition for the node should be set to ‘Normal(1.19,0.1)’