Answer:
The structure of the compound is attached below;
Step-by-step explanation:
(A) C1 = SP³ hybridized, C2 = SP hybridized C3 = SP hybridized, C4 = SP³ hybridized, C5 = SP² hybridized, C6 = SP² hybridized
(B) Pi-bonds present is only one and its located between C5-C6
(C) 120° bond angle occur in pi bonds and the only pi- bonds present is between C5 and C6.