Answer both of them please

7. Given, a composite periodic signal passing through a channel consists of 9 frequency components of 150,250,300,400,550,700,900,1100 and 2150KHz. There are 8 bits per signal level. Predict the appropriate bit rate and SNR in decibel for the channel. [5 points] 8. What are the propagation time and the transmission time for a 4.5-millon bits message (an e-mail) if the bandwidth of the network is 2 Gbps? Assume that the distance between the sender and the receiver is 15,000km and that light travels at 2.4108m/s. [5 points]