Q:  Determine the value of current I₀.

Solution:          We need to calculate the current I₀.The circuit may be redrawn like

                                    Here it given

                                     I₁ = - 2mA

                                     I₃ = 4mA

                                    By apply KVL on the mesh 2

                                                 2kI₂ + 1k(I₂ - I₁) = 1₂

                                                                3KI₂  + 2 =1₂

                                                        I₂ = 10/3 mA = 3.33mA

                     Now to calculate the value of I₀

                                                            I₀ = I₁ - I₂

                                                            = - 2 - 3.33 = - 5.33 mA