1. (15 points) Consider a structure to describe a circle - something with a center (x,y) an a radius r. x,y and r are each double-precision floating point numbers. (a) write a C structure statement for a circle (b) write C code to declare two variables (c1 and c2) as circles (C) write C code to initialize c1 as a circle of radius 1.5, centered at the point (1.0,2.0) (d) write C code for a function named "large" which accepts one argument (a struct circle), and returns a 1 if the radius is >= 5, 0 otherwise