We Have Only Made Two Extra Posts Today,

as the first was a big one and took me a bit of time manipulating the pictures,

and then I got bogged down on this one, naturally being about fish it took my attention,

it is a problem about the transporting of rare, endangered fish in aquariums on a boat that loses it's cargo, you need a submarine to collect them, but there are sharks in the area and there is a time limit before the fish in the aquariums die, you have all of the information you need at 2.30 into the video, so stop it then and with pen, paper and a couple of your brains logic cells you can work out the answer, before you start it is at least a two cup of coffee problem!