<prompt> In myocardial infarction, the infarct acquires hyperemic rim with a yellow center at1-2 hours3-7 days7-14 days10-20 days  <response>: Findings of infarct at 3 - 7 days: Gross examinationHyperemia borderSoftening yellow-tan center Histopathology light microscopyThe beginning of the disintegration of dead muscle fibersNecrosis of neutrophilsThe beginning of macrophage removal of dead cells at the border 