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P7. Take p to be a point on the unit circle with the property that the length of the arc from (1,0) to pis 6. Determine tan(f) if p lies on the line that is given by 8 P8. Take p to be a point on the unit circle with the property that the arc from (1,0) to p . aths 15 ,-j = of the unit circle. Determine the fraction of the unit circle given by the arc from p to (1,0). P9, (a) Is the vector (1,2) orthogonal to (5, 3)? (b) Is the vector (1,2) orthogonal to (3, 6)7 P10, (a) Is the vector (2,5, 1) orthogonal to (1,2,7)7 (b) Is the vector (2,5, 1) orthogonal to (3,2,4)? P11. Identify a nonzero vector that is orthogonal to any vector that moves points along the plane that is given by 2z + 3y z = 10. P12. Identify the vertex of the quadratic polynomial f that is given by fz) =34 (z - 7)% + 4. P13. Identify the equations below whose associated graphs have a maximum y-value. y=2r2+zx-5 y=2%+5z+3 P14. Identify all zeros of the polynomial P that is given by P(z) = 4(z + 3)%(z 5)3(z 7). Identify the order of each of the zeros