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Let the area of a Δ PQR with vertices P(5, 4), Q(–2, 4) and R(a, b) be 35 square units. If its orthocenter and centroid are O ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ 5 14 , 2 and C(c, d) respectively, then c + 2d is equal to

1. 3 7
2. 3
3. 2
4. 3 8

Correct answer: 3

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