Please answer questions 2 and 3. I'm not certain about my answers and would appreciate clarity on what the correct answers are for questions 2 and 3.

2. Which of the following will have the lowest melting point? Assume ideal dissociation occurs. b) 0.75molalMgCl2(aq) c) 0.75 molal C12H22O11(aq) d) pure water 3. Which of the following will have the highest melting point? Assume ideal dissociation occurs. a) 0.75molalKCl(aq) b) 0.75molalMgCl2(aq) c) 0.75 molal C12H22O11(aq)