How to know which version Zend framework used to build website

My name is Dineshkumar BH from India. I have outsourced build website "www.firstimpressiion.com. The developer no more available. Still some work is pending and need to update it. When he was developing he told me he used send framework. But when I given for further development other’s developer’s telling it’s built on Zend framework. When i crosschecked no where showing framework details. Please help how recognize

Please help how recognize

You can ask other developers to send you a version.

Or you can execute command “composer show -i” to see packages and package’s versions.