Ok, so I’m not a wizard like @Bending_Cheese67 or @SANY-72Q and I didn’t want to just copy their methods, so I continued to refine my own method and managed to achieve 4 minutes exactly. Like I say, I’m no wizard but I thought I’d share anyway, simply because it’s a totally different way of doing the mission (except one minor detail*).
*I had to use the ceiling shooting idea at the end, simply because the shop keeper woman inexplicably stopped responding to any distractions. In my original run, I used the phone to get her to the balcony, threw the golf ball behind her at her feet and blew her over the railings. This stopped working for some reason, so I resorted to shooting the ceiling so she would move. Other than that the run is totally different.