Answer Happy

Given the following electric field diagrams: What are the respective charges of the yellow particles shown in diagrams (a), (b), and (c)? (a,b,c)=(+q,q,−q)(a,b,c)=(+q,−q,−2q)(a,b,c)=(−q,+q,+q)(a,b,c)=(−q,+q,+2q)​