user: I need to solve a few quadratic equations for a math assignment. Could you calculate the roots for these sets of coefficients: 3, 7, and 2; 5, 12, and 4; 8, 16, and 6; and 10, 20, and 8? I'm trying to understand the pattern of the roots in relation to the coefficients.

Available functions:
name: quadratic_roots
description: Calculates the roots of a quadratic equation.
parameters: type: dict
properties: a: type: integer
description: The first coefficient.
b: type: integer
description: The second coefficient.
c: type: integer
description: The third coefficient.
required: a
b
c