Point \blue{A}Astart color #6495ed, A, end color #6495ed is at \blue{(-4, 8)}(−4,8)start color #6495ed, left parenthesis, minus, 4, comma, 8, right parenthesis, end color #6495ed and point \purple{M}Mstart color #9d38bd, M, end color #9d38bd is at \purple{(1, 7.5)}(1,7.5)start color #9d38bd, left parenthesis, 1, comma, 7, point, 5, right parenthesis, end color #9d38bd. Point \purple{M}Mstart color #9d38bd, M, end color #9d38bd is the midpoint of point \blue{A}Astart color #6495ed, A, end color #6495ed and point \green{B}Bstart color #28ae7b, B, end color #28ae7b. What are the coordinates of point \green{B}Bstart color #28ae7b, B, end color #28ae7b?