Yes, those scripts would be easy to make.
You're looking for the "Set Field" script step. Inside the dialog for that step, there are options to specify which field to set, which repetition to set, and what value to use when setting the field.
You can use multiple "set field" script steps in a single script created in the script workspace, and then you can create a button on your layout, specifying that it should run a selected script.
This is basic filemaker development, and I'd highly encourage taking a training course if you want to accomplish all the development on your own without frustration.
Not 100% following but you could do this if it fits. This pseudocode assumes the data all resides in the same table.
SetVariable($Control; Get ( ScriptParameter ))
If $Control = 1
SetField (Task2;"Something Else")
ElseIf $Control = 2
SetField (Task1;"Not Something")
SetField (Task3;Get(CurrentDate) + 14)
ElseIf $Control = 3
You then create your buttons, attach the same script to each one and assign the Optional Script Parameter per button to get into the correct branch of the script logic.
"It's not difficult to tell crocodiles and alligators apart. One will see you in a while whereas the other will see you later."
Thank you so much Mike - I figured it out!... Easy when you know how huh! ... yes I do need to do a course.
thanks again for the pointer though.