Pls help me to solve the following problem.
How to calculate the lamda of the Poisson distribution if the
following table of information can be represented by
Poisson Disribution?
And also how to calculate the respective expected
Q)The table below shows the number of employees in thousands at five factories and the number of accidents in 3 years.

Factory A, B, C, D, E
Employees(thousands) 4, 3, 5, 1, 2
Accidents 22, 14, 25, 8, 12

Using 5% significance level, test the hypothesis that the number of accidents per 1000 employees is constant at each factory.