(c) Suppose you have 3 hard disks. You want to add one more 'parity' disk, so that you can reliably recover from any single hard disk crash. Assume that the parity' disk is added, so that the sum of the bits is always even. Now, one of the four hard disk crashes. The first byte of the other three hard disks are: 01010101 11011001 01101101. What was the first byte in the crashed hard disk