What is the level of normalization in the table shown below, considering ISBN as the PK$?$

ISBN

Book title

Publisher

Year

Price

Publisher Address

$1234123412$

The Magic of Light

Penguin

$2020$

$25\mathrm{.}00$

England, UK

$1234123412$

The Magic of Light

Penguin

$2020$

$25\mathrm{.}00$

England, UK

$432341245$

Talking Trees

Better Books

$2015$

$32\mathrm{.}00$

Singapore

$856473913$

Dial Tone

Harper Collins

$2010$

$28\mathrm{.}00$

Sydney, Australia

$856473913$

Dial Tone

Harper Collins

$2010$

$28\mathrm{.}00$

Sydney, Australia

$1$NF

$2$NF

$3$NF

$4$NF