I need help with the following questions. Please help.

Q1- If the system crashes with a blue screen, this means:

The developer forgot to use a try / catch block

A device drive was trying to change the shared system memory

An application was trying to change the shared virtual memory

An exception thrown in kernel mode was unhandled

Q2- With Wow64, file system redirection means:

accessing files larger than 4GB becomes possible

launching 32-bit processes becomes possible

reading 64-bit values change to 32-bit values

accessing files in system locations gets the 32-bit version

Q3- System calls are made with:

A system threads

A thread created and managed by CSRSS

The app's thread

A kernel thread created upon process start