How does the multiplicity of a zero affect the graph of the polynomial function?

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the zeros of a ninth degree polynomial function are 1 (multiplicity of 3), 2, 4, and 6 (multiplicity of 4).

the graph of the function will cross through the x-axis at . the graph will only touch (be tangent to) the x-axis at .

at the zero of 2, the graph of the function will the x-axis.

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap