1. Differentiate each of the following: a 4 .1?21 - 3 c.r 2: b ?a: 5n? C. 1 d ??-4? . 1 2. A partic e moves along a line so that, at time , its , usition is ?( ) - - where s is the displacement in met. es. Determine the object's velocity at ? = _? [4] w. The hypotenuse o. a right triangle is 14cm. Calculate the measures of the unknown ang'es in the triangle to maximize its e imeter. [8] 4. Determine the absolute extreme values of? = ?.? -? where ?610, . ] [5]