knockout js get data on check box selecting individual

Question

I am using knockoutjs for binding, I am binding data in a list with a checkbox, I have a button which is used to select all the checkboxes when I click, but now I want to create new function on individual click, or check when it is selected I need to get all data related to that checkbox here is my code:

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https://jsfiddle.net/kyr6w2x3/102/