A Laptop Battery Lifespan Follows a Normal Distribution with Mean $\sigma$

Multiple Choice

A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation $\sigma$ =6 months.To test the alternative hypothesis that μ < 22 with α = .01,36 laptop batteries are randomly selected.Assuming that μ=24,the probability of type II error is approximately

A) -.01
B) 2.33
C) -4.33
D) 0.01
E) 0.00