You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[Q]: Question: Find the equation of a line which passes through A(4, -1) and is parallel to x axis.

 Option A: y=-2

 Option B: y=3

 Option C: y=2

 Option D: y=-1

 Option E: y=0
[A]: Option D


[Q]: Question: Two out of five employees are capable of doing a certain task. Sixty percent of the five employees, including the two who are capable, are assigned to a project involving this task. what percentage of employees assigned to the project are not capable?

 Option A: 43.33%

 Option B: 33.33%

 Option C: 13.33%

 Option D: 38.33%

 Option E: 23.33%
[A]: Option B


[Q]: Question: Calculate the mean of each data set {9,10,11,7,13}

 Option A: 4

 Option B: 5

 Option C: 8

 Option D: 9

 Option E: 10
[A]:
Option E