a$.$ Compute the attribute closure of $B.$

b$.$ Determine a candidate key for the above relation $($You need to use the attribute closure approach, clearly state steps of determining the key$)$

c$.$ Does this relation violate any of the three normalization stages? If so$,$ normalize the above relation up to $3^{rd}$ normal form. Explain why was not in any of the normal form, if you answered that relation was not in any of the normal forms. $($If this is not in $2^{nd}$ normal form, why and if this is not in $3^{rd}$ normal form, why?$)$

d$.$ Explain how it eliminates delete anomalies if you bring the above relation to $3^{rd}$ normal form.

e$.$ Write a relational algebra expression to retrieve A$,$ B$,$ I where the I $="$My Key" from your normalized schema. $($Your schema may have multiple relations if you normalize the above relation$).$ You may need to name each resulting relation to be used in the expression.