Answer
Initial values
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 0 $\ \ \ \ $ product = 0
After pass 1
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 1 $\ \ \ \ $ product = 2
After pass 2
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 2 $\ \ \ \ $ product = 4
After pass 3
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 3 $\ \ \ \ $ product = 6
After pass 4
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 4 $\ \ \ \ $ product = 8
Work Step by Step
Initial values
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 0 $\ \ \ \ $ product = 0
After pass 1
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 1 $\ \ \ \ $ product = 2
After pass 2
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 2 $\ \ \ \ $ product = 4
After pass 3
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 3 $\ \ \ \ $ product = 6
After pass 4
a = 2 $\ \ \ \ $ b = 4 $\ \ \ \ $ count = 4 $\ \ \ \ $ product = 8