In this task, you need to provide the correct option for a given problem on probability from the provided options.

Input: Consider Input: Problem: if a coin is flipped , the probability that the coin will land heads is 1 / 2 . if the coin is flipped 5 times , what is the probability that it will land tails up on the first 4 flips and not on the last flip ? 
Options: a ) 1 / 8 , b ) 1 / 32 , c ) 1 / 4 , d ) 1 / 2 , e ) 1 / 16

Output: b


Input: Consider Input: Problem: a fair coin is tossed 5 times . what is the probability that it lands heads up at least twice ? 
Options: a ) 1 / 16 , b ) 5 / 16 , c ) 2 / 5 , d ) 13 / 16 , e ) 27 / 32

Output: d


Input: Consider Input: Problem: find the probability that a non leap year selected at random will have 53 sundays 
Options: a ) 6 / 7 , b ) 5 / 7 , c ) 4 / 7 , d ) 3 / 7 , e ) 1 / 7


Output: e