A concave spherical mirror has a radius of curvature of 15.0 cm .

a) Calculate the size of the image formed by an 9.00 mm -tall object whose distance from the mirror is 3.75 cm. (s'₃ = -7.50 cm)

|y₃'| = ________ mm

b) Calculate the size of the image formed by an 9.00 mm -tall object whose distance from the mirror is 10.0 mm. (s'₄= 7.56 cm)

|y₄'| = ________ mm