D. Identify both the mask and the Boolean operation needed to accomplish each of the following objectives 1. 2. Put is in the middle four bits of an eight-bit pattern without disturbing the other bits. Take the complement the first four bits of an 8-bit pattern without changing the other bits. 3. Clear all but the least significant bit of an 8-bit pattern without disturbing the least significant bit. 4. Change an uppercase ASCII code character to its corresponding lowercase code