please answer questions three and four

2pts (a) What is the mass of one 12C atom in atomic mass units (amin)? (b) What is the mass of an average C atom in atomic mass units (amig)? (c) What is the mass of an average Cl atom in amu? (d) What is the mass of an average Br atom in amu? 4. The molar mass scale gives masses in grams (g) relative to the mass of 12C.2pts (e) What is the mass in grams of 1 mole (mol) of C? (B) What is the mass in grams of 1mole(mol) of Cl