Thor has dropped his hammer, Mjolnir, into a 1ft x 1ft x 3ft container full of distilled water. If Mjonir has a uniform density of 7.8 g/cm3 and the water level was 1.5 inches lower after Thor summoned Mjolnir back to him. What is the mass of Mjolnir in kilogram? Could an average adult lift it? Please show step-by-step solution how you will arrive at the answer. Thank you.