Can you help answer these three questions?

6. What is the bit rate for the signal in Figure 4? 16 ns iTime Figure 4. Digital signal 7. Draw the graph of a) NRZ-L and b) Manchaster scheme using cach of the following data streams, assuming that the last signal level has been positive: i 01011101 ii) 10101100? 8. Find the 8-bit data stream for each case depicted in Figure be low Time a. NRZ-I