Molality of 40% (by mass of solution) urea solution is??

Q. Molality of $30\%$ (w/w) urea solution is:

Q. Mass percentage of urea in aqueous solution is 30%.The molality of urea in the solution is:
(Mol. wt. of urea = 60 g mole${}^{-1}$)

Q. What is the molality of a solution containing $200mg$ of urea (molar mass $60g{mol}^{-1}$) dissolved in $40g$ of water?

Q. The freezing point of aqueous solution that contains 5% by mass urea, 1.0% by mass KCl and 10% by mass of glucose is ($K_{f\left(H_{2}O\right)}=1.86K$ Molality${}^{-1}$) :

Q.

2 molal urea solution is diluted from 2 kg to 5 kg by addition of water calculate molality of the diluted solution.