Answer:
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
You bury me when Iām alive and dig me up when Iām dead. What am I?
I am a mini solar powered computer
I help you carry your books.
I am an odd number that become even when beheaded.
No matter how little or how much you use me, you change me every month.