SoulThief

I had a few questions that I hoped someone on here may be able to help with.
I own a 2007 mazda 3. I feel like one electrical thing after another seems to be going wrong. A few years ago, the passenger airbag deactivated light began coming on. I read that somewhere that it was probably a cracked sensor and costly to fix, so I have been ignoring for the most part.
Then recently there began to be trouble with the power windows. First the driver side switch seemed to be going bad since it would only sporadically work for rolling down the windows. It always, and still, will roll up and down the drivers window fine. At first it would work sometimes and sometimes not on rolling the other windows down. It seemed to always be able to roll them up fine, but you'd have to roll them down from their switches. Now the back windows seem to still work, but occasionally not. also the front passenger window seems to only roll up and down sporadically.
At first I though it was the driver switch, but since parts of it still worked no problem, and the other ones all had some issues other than completely not working I am confused about what it could be.

The last issue I have for this post is that the cruise control is not working right or all the time. The clutch started going out and that is when it first started acting up. I had the clutch replaced and the cruise is still a problem. It does not always work now.
It will sometime not turn off or turn on when the buttons on the steering wheel are pushed. It will sometimes turn on if the button is pushed multiple times, and others not at all. Once you get it on, it will sometimes register the other button pushes sporadically. It doesn't always set the speed or return to set speed after braking.

These may all be seperate things, but since they are all sporadic instead of completely not working, and since they are all electrical issues I thought they may be related, or hoped that I am overthinking it and missing the fix on these things.

Any help would be appreciated.
Thanks

SoulThief

An Update. I replaced the battery in my car. Since then, the cruise control is still not working all the time, but it is now working much more often than before I replaced the battery. Can anyone Please help me with these problems.