4. Compute the magnitude of the resultant force on the indicated area and the location of the centre of pressure as shown in Figure 4. Show the resultant force on its location. -0.76m- 146 0.46m 0.46 m 2.4 m Water Access hatch for cleaning 45" Figure 4: A Water Tank 0.9 m (10 Marks) 5. Compute the magnitude of the resultant force on the indicated area and the location of the centre of pressure as shown in Figure 5. Show the resultant force on its location. Turpentine sg=0.88 70 0.80 m 0.5 m Semicircular hatch 1.50-m diameter