the iPad I have was purchased from the estate of the original ower. Shince she has passed away there is no way to get the information needed to unlock the iPad. Hoa can I do this?

Here are the Apple support pages that outline the Activation Lock - and the only mechanisms by which it can be turned off:

https://support.apple.com/en-us/HT201365

https://support.apple.com/en-gb/HT201441

As you will discover, unless you are the owner of the AppleID that was last used to activate the device, or unless you can secure the cooperation of the previous owner, you’ll not be able to defeat or bypass the Activation Lock. Without documentary evidence that you are the original owner (such as sales receipt showing the serial number), Apple won’t assist - and nobody here will be able to help you.

Sorry, this is perhaps not the news that you we hoping to hear.

You don't, you need the previous owners information to remove the icloud lock.

Turn off Activation Lock - Apple Support