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a . ) class Calc: d e f i n i t s e l f : self.num 0 fCalcs = 0 def add (

a.)
class Calc:
definitself :
self.num0fCalcs =0
def add(self, x,y):
self.num0fCalcs +=1
return x+y
def sub(self,x,y) :
self.num0fCalcs +=1
return x-y
b.)
class Calc:
def_init_(self):
self. num0fCalcs =0
def add(self,x,y) :
num0fCalcs +=1
return x+y
def sub(self, x,y):
num0fCalcs +=1
return x-y
c.)
class Calc:
def_init_(self):
self. num0fCalcs =0
def add(self):
self.num0fCalcs +=1
return x+y
def sub(self):
self.num0fCalcs +=1
return x-y
d.)
class Calc:
def_init_(self):
self. num0fCalcs =0
def add(self):
num0fCalcs +=1
return x+y
def sub(self):
num0fCalcs +=1
return x-y
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