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While the above method is a simple method of drawing conjugated p-orbitals, the process which generates these three orbitals is the interaction of the -bonding and *-antibonding orbitals of the double bond with the neighboring p-orbital. The process is shown in the figure below. WS-1.19: Draw a well-labeled orbital diagram (similar to Fig. 12) for the allyl radical. 2. Four-, five-, and six-center conjugated and MO systems. The method for creating larger conjugated MO is similar to the exercise we did for the allyl systems. WS-1.20: Draw the resonance forms for 1,3-butadiene. Which two-center MOs will interact to generate the MO diagram for butadiene? WS-1.21: Using these two-center MOs identified in WS-1.20, draw the four-center orbital correlation diagram for butadiene. (Use the process shown in Fig. 12)