6) How much of their electricity consumption is from carbon free sources?
This is very different to asking how much renewable energy they purchase.
Cloud vendors such as Google will state - entirely legitimately - that they "match 100% of their global electricity use with purchases of renewable energy." This is great, but it does not mean the same thing as being powered by 100% carbon free electricity all the time - which is the ideal. Google's target for that is 2030, and in 2021, the most recent year for which data is available, w66% of Google's datacentre electricity consumption as matched with regional, carbon-free sources.
What's the difference?
It comes down to grids, some of which are connected to more renewable sources than others. (This also explains the difference between location and market-based emissions reporting.) Google (and other hyperscalers) use instruments called PPAs to buy energy directly from renewable projects in the regions where their datacenters are located.
The balance is likely to be made up with Renewable Energy Certificates (RECs) A REC is created with every MWh of renewable electricity generated but they aren't an ideal way of buying renewable electricity because they don't necessarily generate additional renewable energy (companies often buy then in advance because renewable projects take time to build and begin transmitting to the grid.) because they can be sold more than once.
If vendor is using RECs to stand up a 100% renewable energy claim they should be retiring those RECs or their energy provider who may be buying RECs on their behalf as part of a green tariff should be doing so.
Of course, companies can generate their own renewable energy with solar panels and wind turbines but the amount of energy these installations contribute to factories or datacentres tends to be very small scale - 1% or 2% at most.