Find the difference of the numbers. Express your answer in scientific notation.
(3.57 times 10 Superscript negative 6 Baseline) minus (2.19 times 10 Superscript negative 17)
1.38 times 10 Superscript negative 7
3.351 times 10 Superscript negative 7
1.38 times 10 Superscript negative 7
3.351 times 10 Superscript negative 6