S.E.E stands for Signing Exact English.
It’s more visual sign but it is somewhat improvised. Certain signals will have different prefixes and the same root sign. Signers gain a bigger vocab this way but it takes longer
P.S.E is Pidgin signed English. This helps keep the pace when corresponding with speaking. So words that aren’t that meaningful to the sentence are removed.
About 73 years. You would use the compound interest formula.
1290=430 ( 1 + 1.5/100) ^ t
t = 73.788 years
Here is the answer. I think you were asking for the numbers so I took a picture. American keyboards don't have Arabic (unless I download it.) I hope I helped you.