A 68-year-old woman is discovered dead in her home in Bangalore (ambient temperature 28°C, humidity 75%) after her daughter could not reach her for 3 days. On autopsy, the body shows extensive skin slippage, loss of hair and nails, marked abdominal bloating with gas-filled loops visible on radiography, and liquefactive decomposition of internal organs. The bones are still intact but show early discoloration. Which post-mortem interval best fits these findings?