Help answer the following questions please,

You are walking up the sidewalk to a house to deliver a subpoena. You step onto the porch of the house and knock on the door. Nobody answers the door, so you peer into the window while standing on the porch to see if anyone is home. You don't see anyone, but you see a brick of what appears to be cocaine sitting on the coffee table. Can you go into the house to get the cocaine? Why or why not? If you can go into the house, where else can you search? If you can't go into the house, what should you do next?

You are driving through a neighborhood on routine patrol. You see a bag of garbage outside on the curb by the street in front of a known drug dealer's house. You think there might be evidence of drug dealing in the garbage bags. Can you search the bags?