The backplane of an old PC has a 64-bit PCI-X parallel bus clocked at a frequency of 133 MHz. This is to be replaced with a newer PCI Express backplane. For simplicity, assume that the PCI Express bus consists of a single serial channel transferring one bit every clock cycle. Determine the minimum clock frequency in GHz required for the PCI Express bus to match the bandwidth of the PCI-X bus it is replacing