Calculate the $\backslash (2^\{\backslash$text $\{$nd $\}\}\backslash )$ moment of area of the gross concrete section shown on the left below.

Then calculate the uncracked $\backslash (2^\{\backslash$text $\{$nd $\}\}\backslash )$ moment of area of the composite section shown below on the right if the links are $8$ mm diameter and cover to all steel is $40$ mm $.$

Comment on the differences between the two.