Drupal 8, Views: Count how many children have a reference to the parent

Explanations:

1) I have a node "parent"

2) I have 2 nodes "child"

3) Each child has a reference field (filled with a reference to the node "parent")

Now, I'm trying to create a list with the Views module.

First problem: This list is a list of "parent" nodes AND should include a column with the following result: COUNT(child with a reference to the parent).

Second problem: The count result should include only published children.

Example 1 with 2 children published (2 children have a reference to the parent):

Title of parent node | 2

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Example 2 with 1 child published (2 children have a reference to the parent):

Title of parent node | 1

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Sorry if it's not totally clear, it's hard to explain Thank you