Can someone help me with this question:

I get:

- 50 mg of a sample (MW = 250, λmax = 500nm) is dissolved in 250 mL of ethanol and 1.0 ml of this solution is diluted to 1000 mL to give solution A. If the absorbance of solution A at 550nm in a 1.0 cm cell is found to be 0.8 calculate:

- the concentration of solution A
- the molar extinction coefficient.

a. 0.0002g/L

b. 1.0 x 10^{-8}