Consider CSMA/CD LAN with bandwidth 10 Mbps and propagation delay of 5 μsec. Repeaters are not allowed in this system. Data frames are 512 bits long, including 32 bits of header, checksum and other overhead. The first bit slot after a successful transmission is reserved for the receiver to capture the channel in order to send a 32 bit acknowledgment frame. The effective data rate of the network is ________ (in Mbps). (Excluding overhead, assuming that there are no collisions)