6. A container with this page is made with a solid base of diameter 14 cm. The container is filled with water at a rate of 2cm min" . At time t minutes, the water depth is hom, 0 & h & p and the volume of water the container is V cm3. (b) (1) Given that = an=P (3cos2h+4)2, find an expression for- (2). Find the value of - when h= (3). Find dt2 4. Find the value of h for which dzh=0. dt2 5. By making specific reference to the shape of the container, interpret " at the values of h found in part [c] (ii)