How can I use the flow chart to answer these questions?

Use the flow charts at the end of the experimental procedure to answer the following questions. In each question, a test is carried out to determine the presence or absence of several ions. Only those listed may be present. State if the tests indicate if each ion is present, absent, or undetermined. 4. Test for coe- and cr Some 6 M HCl is added to the solution that may contain the above ions. Formation of bubbles is noted as the solution is heated. Ions present: Ions absent: Ions undetermined: 5. Test for CI-, sor, C032-, and NO' Addition of causes no precipitate to form. Addition of BaC12 to fresh solution also causes no precipitate to form. Ions present: Ions absent: Ions undetermined: Only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. 7. NOE(aq) + OH-(aq) + A1(s) -+ + + A1(s) Qualitative Analysis of Anions AgCl(s) 1 NHa HN03 AgCl(s) C02(g) Bacos(s) BaS04(s) NH3(g) Flow Chart CI-. sor, C032-, Noa- 1 AgN03 SO,2-, C032-, NO - 3 cr. so,2-, cor. NO, 2 HN0a cr. coa2-, Noa- cr. so,2-, coa2-, Nos- 3 Bact2 cr, C032-, N03- CI-, soa2-. CO 2-. NO - 3 NaOH 4 A1 ct-, soa2-, co 2-