1. Please write down the coordinates of point P' obtained from point P( 1, -2) and tell us how to translate from point P to point':

( 1)P(x，y)→P'(x，y+ 1)； Translate one unit upwards.

(2)P(x，y)→P'(x- 1，y)； Translate one unit to the left.

(3)P(x，y)→P'(x+2，y+3)； Translate two units to the right and three units up.

(4)P(x，y)→P'(x-2，y- 1)。 Pan two units to the left and one unit down.

2. Move point P(m+2, 2m+4) to the right by 1 unit length to point P', and the coordinates of point P' are (m+3, 2m+4).

3. After the point P( 1, -m) is shifted to the right by 2 unit lengths, it is shifted upward by 1 unit length to get the point Q(n, 3), and the coordinate of the point K(m, n) is (-2, 3).