An Inventor Develops a Stationary Cycling Device by Which an Individual,while

An inventor develops a stationary cycling device by which an individual,while pedaling,can convert all of the energy expended into heat for warming water.How much mechanical energy is required to increase the temperature of 300 g of water (enough for 1 cup of coffee) from 20 $\degree$ C to 95 $\degree$ C? (1 cal = 4.186 J,the specific heat of water is 4 186 J/kg* $\degree$ C)

A) 94 000 J
B) 22 000 J
C) 5 400 J
D) 14 J