Answer:
Structure is attached below.
Step-by-step explanation:
Start drawing the structure by first sketching the pentene parent molecule. The double bond is present at 2 position. Also, a phenyl group is present at 2 position.
The (E) stands for trans conformation which means that the two bulky groups are in opposite side of the double bond. Hence, in this case the two bulky groups are phenyl and ethyl.