A 3m long wall, which has a curved surface is used to restrict seawater (density of 1025 kg/m). The top edge of the wall is 2m below the seawater surface as shown in Figure 1. The curved wall is a quarter of a circle, with a radius of 500 mm. 500 mm B Wall A 2 m Seawater Level Figure 1: Curved wall immersed in the sea. a. Sketch the pressure intensity diagram for the wall. [2 marks] b. Explain with the aid of a sketch how the forces are exerted on the wall. [4 marks] c. Determine the magnitude and direction (angle relative to the seawater surface) of the resultant force. Show all your calculations. [19 marks]