How to build Merkle root from merkle branches?

Is there any help/tutorial on how to build the Merkle root from stratum data?

The Slushpool’s stratum protocol has an example of a mining job but it does not contain any Merkle branches and I don’t know if I am generating the Merkle root correctly.

Here is the string from Slushpool:

{"params": ["bf", "4d16b6f85af6e2198f44ae2a6de67f78487ae5611b77c6c0440b921e00000000",
"01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff20020862062f503253482f04b8864e5008",
"072f736c7573682f000000000100f2052a010000001976a914d23fcdf86f7e756a64a7a9688ef9903327048ed988ac00000000", [],
"00000002", "1c2ac4af", "504e86b9", false], "id": null, "method": "mining.notify"}

Electrum 2.7.9 setup never went through the password and seed setup, now I can’t send coins

I installed the Electrum 2.7.9 wallet and it never went through the password and seed setup. I ended up with a default standard wallet. I then uninstalled the Electrum wallet and then reinstalled it. Once again it didn’t go through any password or seed setup and I had a default standard wallet on my pc. I made the dumb decision, because I am totally new at this, to go ahead and send my bitcoins from my coinbin wallet to the address associated with the standard default wallet and now I can’t send anything because it wants a password. Please help!

Who added the 21 million limit to Bitcoin?

After reading the white paper of Satoshi Nakamoto. The white paper does not mention anything about a limit of money supply.
I think I have read somewhere mentioned the name, but unfortunately I cannot remember it.
If I look in the main resources available online (Wikipedia, bitcoin.org, ..) they all mention Satoshi Nakamoto as the one who added this feature.
If Satoshi was not the one to add this feature, I think it is very important that we know who came up with this, and why the bitcoin dev community at the moment decided to adopt it.