Calculate and plot the radial and circumferential stress distribution in the left ventricle at the end of systole (P- 80 mmHg, assume the ventricle is spherical). The inner radius of the heart is 3.2 cm and the outer radius of the heart is 3.8cm. The external pressure surrounding the heart is -1 mmHg. Under a disease condition where the heart muscle thickens, calculate the radial and circumferential stress distribution in the left ventricle at the end of the systole and at peak systole. Under these conditions the pressure remains the same, but the inner wall radius is 3 cm and the outer wall radius is 4.2 cm. Compare this to normal conditions and comment