Considering the signal encoding answer following questions:. a. Using Differential PSK with fc=1MHz and a data rate =100Kbps, define the signal formula for DPSK signal and draw it for the bit sequence 01010101 . (15 p) b. Using Multiple Frequency Shift Keying with fc=1MHz,fd=25kHz, and L=2 bits. What is the frequency assignment for each of the four possible 2-bit data combinations? (10 p) c. Using Manchester Encoding with data rate = 2Mbps draw signal for the bit sequence 100110100011 and calculate total time for the transmission of this data. (15p)