Carter left his house at time zero and drove for 7 minutes to the store, at a speed of 1 blocks per minute. Then he stopped and went into the store for 5 minutes. From there, he drove in the same direction at a speed of 1 blocks per minute until he got to the bank, which is 7 blocks away from the store. He stopped at the bank for 2 minutes. Then he drove home at a speed of 7 blocks every minute. Make a graph of showing the number of blocks away from home that Carter is xx minutes after he leaves his house, until he gets back home.