6. A point charge is placed at each corner ufa square with side length a. All charges have magnitude q. Twu cf the charges are positive and turn are negative. What is the direction cf the net electric eld at the center of the square due tn the four charges, and what is its magnitude in terms nfg and a? +q {I +q '9' '9' | 7". Achargedpaintisspreadinaverythinuniformlajrercwerthesm'faceofaplasticsphere of diameter 121} cm, giving it a charge of 49.II} ,uE'. Find the electric eld a} just inside the paint layer, b) just utnside the paint layer, c) 5-00 cm outside the surace of the pain]: layer