Six identical solid right pyramids, each with a square base of side length \(a\) and height \(a/2\), can be joined at their apexes to form a solid cube of side length \(a\). A point charge \(+q\) is placed precisely at one of the four corners of the square base of one such pyramid. What is the total electric flux \(\Phi_E\) passing through the surfaces of this single pyramid due to the point charge?