So the homework assignment is Problem 1 (1.1 - 1.5) at the bottom. need help with 1.2 - 1.5

Definition 1 Denote by Ls,the straight line that is perpendicular to the direction (cos(a), sin(a) and at distance r from the origin 0= (0,0). Thus (x, y) is on the line Ls,q if and only if x cos(a) + y sin(a)=r. Common choices are r ER and 0 0 and -A S, then the line Lr,a is too far from 0 to intersect D; thus, (Rx](r, a) = 0 for all r > S and a. If |T| S. Choose either theoretical Problem 1 or computational Problem 2. Problem 1 For all items, c is a constant. Each item specifies a disc or ellipse E. For each item, Xe(x, y) = c if (x, y) is in E, whereas X (x, y) = 0 if (x,y) is not in E. For each item, find an algebraic formula for (Rx](r, a) in terms of r, a, c, and parameters defining E. (1.1) For this item, & is the disc with radius S centered at (x0,yo): where (2 xo)2 + (y yo) 0 and -A S, then the line Lr,a is too far from 0 to intersect D; thus, (Rx](r, a) = 0 for all r > S and a. If |T| S. Choose either theoretical Problem 1 or computational Problem 2. Problem 1 For all items, c is a constant. Each item specifies a disc or ellipse E. For each item, Xe(x, y) = c if (x, y) is in E, whereas X (x, y) = 0 if (x,y) is not in E. For each item, find an algebraic formula for (Rx](r, a) in terms of r, a, c, and parameters defining E. (1.1) For this item, & is the disc with radius S centered at (x0,yo): where (2 xo)2 + (y yo)