Block $A$ is submerged in a fluid. It hangs from a spring balance as shown. The mass of the beaker is $0\mathrm{.}5$ kg $.$ The mass of the liquid is $1\mathrm{.}5$ kg $.$ Balance $D$ reads $4\mathrm{.}0$ kg and Balance $E$ reads $7\mathrm{.}5$ kg $.$ The volume of Block $A$ is $4\mathrm{.}0{10}^{-3}{m}^3.$

c$.$ What is the mass of the block?