Please show work and explain bot questions for me, thanks.

12. State the [H3O+]and [OH]to the correct number of significant figures for each of the following solutions. Do not show your work. The [OH]should be listed to the right of your [H3O+]value for each part. a) pH=9.8 b) pH=3.51 c) pOH=3.004 d) pOH=10.00