need help with two more homeowkr questions please on projection

Find the standard matrix of the given linear transformation from R2 to R2. Projection onto the line y - 6x Need Help? i Let T: Rm 0 R\" and S: R\" > R\" be linear transformations. Then S o T: Rm D R15 Is a linear transformation. Moreover, their standard matrices are related [5 o T] ' [5H7]- Verify the theorem above by nding the matrix of s o 'i' by direct substitution and by matrix multiplication of [S][T]. T *1 _ X1 4' 3X2 5 Y1 _ Y1 '1' 4Y2 x2 '2X1 + X2 ' if: F1 - 72 (a) by direct substitution (b) by matrix multiplication