<image>(2015 Autumn, County-level Monthly Exam in Shenqiu County) As shown in the figure, the Olympic mascots move along the grid lines on a 5×5 grid (each small grid is 1m on each side). Beibei starts from point A to look for the other mascots at points B, C, and D. It is stipulated that moving up or to the right is positive, while moving down or to the left is negative. If the movement from A to B is recorded as: A→B(+1,+4), and the movement from B to A is recorded as: B→A(-1,-4), where the first number indicates the left-right direction and the second number indicates the up-down direction, then in the figure:
(1) B→D(____,____), C→____(-3,-4);
(2) If Beibei's walking route is A→B→C→D, please calculate the distance Beibei walked.