Oh come on! you must be able to come up with some ideas of your own!
There is no one "textbook" answer to your homework, and I suspect that your lecturer is expecting to do some thinking of your own, maybe along with a little research, then come up with your own ideas.
Let me get you started -
Q1 maybe some kind of temperature measuring device would help forecast, and maybe a way to send the temperature to some other device for recording? What other things might you need?
Q2 what kind of things might you measure to find out energy use?
Q3 can't think how this is done, so if it were my homework I would Google all about instrument transformers.
Try and make some effort on your own, then post your ideas here to see if we can come up with improvements or correct errors.
Just posting a bare set of homework questions shows no respect for forum members or for yourself.