Which of the following is a zero order reaction?

$A$ zero-order reaction,$A \rightarrow \text{Product}$,with an initial concentration $[A]_0$ has a half-life of $0.2 \ s$. If one starts with the concentration $2[A]_0$,then the half-life is $.... \ s$

$A$ zero order reaction is one whose rate is independent of

For a zero-order reaction,the ratio of $t_{1/2}$ to $t_{3/4}$ is ....

Which of the following graphs represents a zero order reaction?
($a = $ initial concentration of reactant,
$x = $ concentration of reactant consumed,
$t = $ time)

For the thermal decomposition of reaction $AB_{(g)}$, the following graph is provided. The half-life of the reaction is $x \ min$. Find $x$. (Nearest integer)