1. Point charges Q1 and Q2 are respectively, located at(4,0,-3) AND (2,0,1). If Q2=4nC, find Q1 such that
a. E at (5,0,6) has no no z component
b. The force on a test charge at (5,0,6) has no x component
2. Let D= 2Xy(ax)+ x^2(ay) C/m^2 and
a. find a volume charge density px
b. the flux through the surface ),0