Question for Bay Area Residents ?

I have a 2pm flight to catch at SFO Int'l. Coming from Sacramento. Planning on taking the Amtrak to the Richmond Station, take the Bart to MacArthur Station, then transfer @ MacArthur Station to the Bart going to SFO Int'l. What is the train number/letter that I take from Richmond to MacArthur, then from MacArthur to SFO Int'l ? How early morning would you recommend leaving from Sac ?