What, according to Heidegger, is the difficulty in giving an appropriate account of the nature of equipment?

Please read in Heidegger’s “The Origin of the Work of Art” from page 13, second paragraph (the paragraph beginning with “But what is the path to the equipmentality of equipment?”), to page 16, second paragraph.What, according to Heidegger, is the difficulty in giving an appropriate account of the nature of equipment? How does the Van Gogh painting help to solve this difficulty? What is the relation between equipment and worldliness, as described in this passage?Please give your answer in the form of a short essay, 300 words or less.