$(1$ pt$)$ Blocks $1$ and $2$ are floating like icebergs in the sea $($the horizontal line$).$ We can see all of Block $1,$ but the bottom of Block $2$ does not show. If the blocks are made of the same material, how much of Block $2$ will be below the sea according to isostasy?

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a$)$ The bottom of Block $2$ will be deeper than the bottom of Block $1$

b$)$ The bottom of Block $2$ will be even with the bottom of Block $1$

c$)$ The bottom of Block $2$ will be shallower than the bottom of Block $1$