In the early twentieth century what two experiments involving light and matter

When using the scientist method, which step comes last?

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.

What is the largest meteoroid that has collided with this planet