please help with all parts

1. In ice-cream making, the temperature of the ingredients is kept below 0.0C in an ice-salt bath. a. Assuming that NaCl(MM=58.44g/mol ) dissolves completely and forms an ideal solution, what mass is needed to lower the melting point of 5.5kg of ice to 5.0C ? b. Given the same information as in Part a, what mass of CaCl2(MM=110.98g/mol) is needed? c. Suggest a reason for the difference in amounts for Parts a and b. d. Calculate the osmotic pressure of the sodium chloride solution at 5.0C