A group of students are conducting an investigation about charging through the process of friction. They then rub the two materials together. As they rub the materials together, there is a transfer of electrical charge from one material to the other material. The silk material has a greater electron affinity (attraction) than the glass. After this process the silk is __________ charged, the glass rod is ________ charged, and the overall net charge (combined charge on both objects) will be _________.