Consider the reactions shown below :

Which of the following statement(s) is/ are correct?

Here,

$\left[\mathrm{X}\right]\to {\mathrm{Ag}}_2{\mathrm{CrO}}_4$ (Red ppt.)

$\left[\mathrm{Y}\right]\to {\mathrm{Cr}}_2{\left({\mathrm{SO}}_4\right)}_3$  (Green coloured solution)

${\mathrm{Ag}}_2{\mathrm{CrO}}_4$  is soluble in ammonia solution.

${\mathrm{Cr}}_2{\left({\mathrm{SO}}_4\right)}_3$gives green coloured solution with excess of sodium hydroxide solution.

The conversion of ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ to ${\mathrm{Cr}}_2{\left({\mathrm{SO}}_4\right)}_3$ is a redox  reaction.