[10 points] Consider an 8-bit bit vector that represents the availability of 8 instruments (numbered 7 through 0 ) in a lab, where a bit is 1 if the instrument is available, and 0 if the instrument is busy (or being used). i. The student decides to use instrument 4 (which was previously available). What bit mask and operation do you need to perform on the AVAILABILITY bit vector to update it, without unnecessarily affecting the other bits of the bit vector. ii. What bit mask and operation do you need to perform on the AVAILABILITY bit vector if instruments 4 and 7 now become available (they were previously being used) without unnecessarily affecting the other bits of the bit vector