Which of the following statements is/are correct?

In the reaction ${\mathrm{xCu}}_3\mathrm{P}+{\mathrm{yCr}}_2{{\mathrm{O}}_7}^{2-}⟶{\mathrm{Cu}}^{2+}+{\mathrm{H}}_3{\mathrm{PO}}_4+{\mathrm{Cr}}^{3+}$

Cu in Cu₃P is oxidised to ${\mathrm{Cu}}^{2+}$ whereas P in Cu₃P is also oxidised to ${\mathrm{PO}}_4^{3-}$

Cu in Cu₃P is oxidised to Cu²⁺ whereas P in Cu₃P is reduced to H₃PO₄

In the conversion of Cu₃P to Cu²⁺ and H₃PO₄, 11 electrons are involved

the value of x is 6