please show a little work to explain how you got there

We want to consider the lifetime of the fabrique denada clam in months. lts age at death is believed to follow a Weibull distribution. Let X N Webuii (5, ,8). Suppose that 6 = 2.7and [3 = % for the fabrique denada clams. Lenny can determine a clams age by its size. If he randomly selects 12 clams, what is the probability that fewer than 6 of the clams sampled are younger than 5 months? Assume clams checked are independent of each other