need help with C E and F would be appreciated

What is the solubility of the following solutions in the specified solutions at SATP: a) Calcium oxalate (in 0.1M calcium nitrate) [Ans: 2.3 x 108M] b) calcium phosphate (in 0.25M sodium phosphate) (Ans: 1.07 x 1011M] c) mercury(1) chloride (in 0.1 sodium bromide) [Ans: 1.75 x 10M] d) Silver carbonate (in 0.33M silver nitrate) [Ans: 7.8 x 10-4M] e) silver chromate (in 0.6M sodium chromate) [Ans: 6.77 x 10-?M] f) strontium fluoride (in 0.4M calcium nitrate) [Ans: 1.02 x 10PM]