functions exercises exercise what is the purpose of the "defkeyword in pythonait is slang that means "the following code is really coolbit indicates the start of function cit indicates that the following indented section of code is to be stored for later db and are both true enone of the above exercise what will the following python program print outdef fred()print("zap"def jane()print("abc"jane(fred(jane(azap abc jane fred jane bzap abc zap cabc zap jane dabc zap abc ezap zap zap exercise rewrite your pay computation with time-and- -half for overtime and create function called computepay which takes two parameters (hours and rateenter hours enter rate pay exercise rewrite the grade program from the previous using function called computegrade that takes score as its parameter and returns grade as string score > > > > grade enter score enter scoreperfect bad score