Am I supposed to be trying to get the highest possible answer with 7’s or am I trying to use combinations of 7 to equal the number on the left?

I am using netbeans IDE. My GUI wont display the plum colour I've chosen for the buttons (example on 2nd slide). I have not changed anything with the code and it was working fine a few hours ago. Has anyone else had this problem?

I tried to fill in some words but im not confident on how correct they are

my teacher told me to use my notes but the notes dont have anything to help with the homework

for rule 1:
probably ACT