Out of $7$ crystal systems,how many have face-centered unit cells?

What is the total number of Bravais lattices present for different crystal systems?

$Assertion (A)$: White tin is an example of a tetragonal system. $Reasoning (R)$: For a tetragonal system, $a=b=c$ and $\alpha=\beta=\gamma \neq 90^{\circ}$. The correct answer is

Explain the concept of a two-dimensional lattice and a hypothetical two-dimensional crystal.

Statement $1$: Graphite is an example of a tetragonal system.
Statement $2$: For a tetragonal system,$a = b \neq c$,$\alpha = \beta = 90^o$,$\gamma = 90^o$.

$A$ metal has $bcc$ structure and the edge length of its unit cell is $3.04 \, \mathring{A}$. The volume of the unit cell in $cm^3$ will be