Hey guys. I have a project for my photo class. I have to photograph 'time'. The instructor is looking for a conceptual photo, not so much a technical one. My idea is to go into the city and photograph people walking the streets in the business district, in business suits. I want to do this as a long exposure to not focus on one person, but multiple people passing through. But I also want to do this in the daytime. It is going to be done in the rain, most likely since that's what's been forecasted for the week. I also have a Cokin ND4 filter, as well as a Cokin graduated Neutral grey G1 filter. The max aperture on my camera is F/16. Shooting at iso100. Is this going to be possible?