(a)Find the 2-D Radon transform only, of the unit square indicator function:...

(a)Find the 2-D Radon transform only, of the unit square indicator function:

(b)Sketch

(c)Find

(d) Suppose only two projections, for θ = 0 and θ = π/2, are available. Find an expression for the approximate summation backprojection image (given only these two images) and make a sketch of the result.

(e) In general, is it possible to reconstruct f (x, y) perfectly given only a finite number of projections? Explain your answer.