Exposure Blending

Exposure Blending - student project

I am trying to blend three exposures, but not getting the expected results kindly help me. The drop box link has the Original exposures, My Result, expected result and the Photoshop file of my work.

https://www.dropbox.com/sh/53bygw52hf7u918/AACqTRnN6ICWdZ7mAwUtLRV5a?dl=0