Hi Yvan,
In addition to what other have written, I should note that you cannot exactly reproduce those charts in LEAP. Those charts have two dimensions on their x axes (scenarios and years), but LEAP can only show a single dimension on 1 axis.
You could create the charts by first making multiple results tables in LEAP, exporting them to Excel and then using Excel to chart them.
So in short, you can generate the values needed for those charts in LEAP, but you will need to do a bit of additional organization of the values in Excel.
Charlie