I-140 Approved with PD as current. Process for applying I-824 ?

1. yes 2. probably 3. see the form instructions or contact an attorney for individual advice 4. see the USCIS processing times on the USCIS website

Conversion from B2 Visa (medical visa) to F1 visa (student) is possible from USA. How much time does it take and cost for that.

You may find processing times on the USCIS website. In many instances the process takes too long. Consider working directly with an immigration...

How long?

There is no question here. If you have one please repost.

if everything is correct and you are otherwise eligible you should have been approved. When you receive the denial or before contact an immigration...

H1b transfer RFE

Best is to talk with your employer's immigration attorney as the attorney will prepare the reply for your employer.

**Green card through Family**

To estimate the amount of time see the visa bulletin on the US department of state website.

Misdemeanor Speeding conviction and Executive Order

Unless classifiable as a crime involving moral turpitude ( very unlikely ) it has no impact. Have an immigration attorney for CIMT

Can a non citizen minor (5 yrs) get a visa to travel with their us citizen guardians?

Yes it is possible. Check with the country to which you are traveling. A visa to enter the US may also be required.

Can a misdemeanor children become a U.S citizen through parents

Yes it is possible to become a US citizen through naturalization and you may be a US citizen based on your father beaming a US citizen if you are a...

Can my friend's cousin's wife file an FIOA with the USCIS? If so, how?

Yes it is possible and permitted. Ask for all records including video and audio recordings.