$[3$ pts$]$ Exercise $3\mathrm{.}2$: Possible Data Types #$2$

Say that $s1$ to $s4$ below are another four VHDL signals. Based on the assignments presented,

list which synthesizable predefined data types each of them can belong to$.$

Figure $3\mathrm{.}2$

Bit$-$based arrays: $($a$)$ Scalar $($single bit$),($b$)1$D $($vector of bits$),($c$)1D1D($pile of vectors$),($d$)2$ D $($matrix of

bits$),($e$)1D1D1D($block of vectors$),$ and $($f$)3$D $($block of bits$).$