Help with lab equation regarding atomic mass

Initial temp. of 100 gm of Fe: 20 degrees Celsius
Final temp. of 100 gm of Fe : 100 degrees Celsius

Initial temp. of 250 ml of water: 20 degrees Celsius
Final temp. of 250 ml of water: 25 degrees Celsius

1. Find the estimate of the specific heat for the metal.
(use 1 cal/gm *C for water)

2.Estimate the atomic weight of the Fe.