Asolution is prepared my mixing 40 ml of pentane c5h12 d

Question

A solution is prepared my mixing 40 mL of pentane (C5H12, d = 0.63 g/mL) with 100 mL of hexane (C6H14, d = 0.66 g/mL). Assuming the volumes add upon mixing, Calculate:

(a) The mass percent of pentane.

(b) The Molality of pentane.

(c) The Molarity of pentane.