 Hello, this is Professor Steven Esheba and I'm just going to take you through some steps on how to do an Albedo calculation. So the first thing you'll want to do is here in our Canvas page, click on this and you'll want to save that link as and eventually move that up to a Google Drive and I've already done that. So I'm going to move on to the next step which is you're going to click on this link for Albedo and it should open up like this. You want to open up with Colab as I've done here and as soon as it comes up we'll see something like this. Now what this does is you're going to import, bring in a file and then there's some resources that you won't have to change, mainly we're just going to look at this last bit here. But first what I want to show you how to do is go to that place there and in your, this should open up your drive and as I say I have already imported my files called green and so there what I'm going to do is go to that part and say copy the path which is what you'll do but based on your own drive and then I'm going to put it there. Now the way you execute each one of these cells, we can do it sequentially, you can press on this button and so that's going to execute that cell and then when you're done with that one you can execute that one. You can also just go to run time and say run all which is a little bit easier. And as you can see what it's done is it's loaded up the image file. The idea here is that this part of the white is an Albedo of one, it reflects everything, the green part will not reflect all light and the black will have an Albedo of zero. And what's shown here is going from left to right across here right in the middle and you can see that the white part has a high brightness level, 0.6 on the scale. The green part has a lower brightness which is like 0.45 then it goes back to white then it goes to black which has a very low Albedo. And so the way you can do this next step on your own if you like or here in Python, what I've done is I've said okay what I really want to know is what's the ratio of the green part to the black part relative to the white part to the black part because that's going to tell me what the Albedo is and that's what I've done here. So that's 0.45 minus 0.05, that part there on the black, divided by the whole range white to black which is 0.6 divided by 0.05 and I had to print out the Albedo which is 0.72 for that green.