$1.(15$ Points$)$ Consider a dual core $($A and B$)$ caches with

a$.$ Snooping Protocol

b$.$ Write Invalidate

c$.$ Write Back

d$.$ Write Allocate

e$.$ Variable x in memory with content $13$

In a table, show the activity and cache and memory content as:

$$ Core A reads x

$$ Core B writes $26$ to x

$$ Core A reads x

$$ Core A writes $3$ to x

$$ Core A writes $4$ to x

$$ Core B reads x