Nexus stuck in boot after lastest update..bricked now. How can I fix it?

A

AC Question

nexus stuck in boot after lastest update....brick now help

2 days ago I got a notice on system updates that there was a update waiting to start.......notice like all the rest......ok,ed the start of it then ited stopped and i started getting google play services has stopped working and google something else too wasnt working......to were i couldnt use the tablet with out the two messages poping up every secsond.....i wanted to do a factory reset so i started that inside the screen....and now its erI am inside the system recovery the bottom of the screen says E: failed to mount /cache