Consider a RAID $4$ storage system with four data disks, and one redundant disk. For simplicity, assume that each disk stores only a single byte! In the redundant disk, we store the XOR of the bytes in data disks. In other words, if the data disks contain bytes B$1,$ B$2,$ B$3$ and B$4,$ then we have B$1$ B$2$ B$3$ B$4$ stored in the redundant disk, where $$ is bitwise XOR operation. Recall that a bitwise XOR takes two bit patterns of equal length and performs the logical exclusive OR operation on each pair of corresponding bits. Suppose the content of data disk one $($i$.$e$.,$ B$1)$ is lost. The content of the redundant disk in hexadecimal is $0$xAB. Furthermore, the contents of data disks in hexadecimal are B$2=0$x$1$A$,$ B$3=0$x$09,$ and B$4=0$x$12.$ Can we restore B$1?$ If so$,$ what is the value of B$1$ in hexadecimal?