Examine the table shown below.

staffNo branchNo branchAddress name position hoursPerWeek

S$4555$ B$002$ City Center Plaza, Seattle, WA $98122$ Ellen Layman Assistant $16$

S$4555$ B$0041614$th Avenue, Seattle, WA $98128$ Ellen Layman Assistant $9$

S$4612$ B$002$ City Center Plaza, Seattle, WA $98122$ Dave Sinclair Assistant $14$

S$4612$ B$0041614$th Avenue, Seattle, WA $98128$ Dave Sinclair Assistant $10$

$($a$)$ Why isthistable not in $2$NF$?$

$($b$)$ Describe and illustrate the process of normalizing the data shown in this table to third normal

form $(3$NF$).$