A solution of water (K_{rm f}=1.86~ ^circ {rm C}/m) and glucose freezes at – 2.95^circ C. What is the molal concentration of glucose in this

A solution of water (K_{rm f}=1.86~ ^circ {rm C}/m) and glucose freezes at – 2.95^circ C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 ^circ rm C.