Suppose we have a new peripheral that has a control register that is 32-bits wide. This control register can be used to control 32 external pins on the device. We can access this register using the pointer port bits. Suppose we want to clear bits 31, 29, 23, 7, 5, 3, 2, and 1. We do not want to change the other bits. What is the C operator and the mask we should use