i need the two question explain in great detail

Oxalate, an important ligand, is shown below. What type of ligand will it act as? A. Monodentate, neutral. B. Monodentate, anionic. C. Bidentate, neutral. D. Bidentate, anionic. E. Tridentate, neutral. CuSO4 aqueous solutions, which contain the metal complex ion [Cu(H2O)5(OH)]+, were previously used to induce vomiting. What is the oxidation state (X) and coordination number (Y) of the metal ion in [Cu(H2O)5(OH)]+? A. X=+1,Y=4 B. X=+1,Y=5 C. X=+1,Y=6 D. X=+2,Y=5 E. X=+2,Y=6