We are told to find a ⋅ b (which is a scaler product)
Taken that,
a = <x₁, y₁>
b = <x₂, y₂>
a ⋅ b = x₁x₂ + y₁y₂
a ⋅ b = (7 * 3) + (4 * 5)
a ⋅ b = 21 + 20
a ⋅ b = 41 (OPTION A)
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