1) When the polynomial 3x^3+ax^2+bx-9 is divided by x-2, the remainder is -5. When it is divided by x+1, the remainder is -16. Determine the values of a and b.

2) Determine the values of m and n so that the polynomial 2x^3+mx^2+nx-3 and x^3-3mx^2+2nx+4 are both division by x-2.

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