Could someone explain or provide solution to these questions. Thanks in advance. (zoom to read)

Figure Q.4(a) shows three curves depicting the energy wit) (in Joules) delivered to three different and unknown circuit elements A, B and C. You may assume, where appropriate, that no energy is stored in any of the unknown elements at time - 0 For each curve, suggest a possible circuit element, giving clear reasons for your answer in each case. You cannot use any element more than once in your answer 15. 10 Element A ElementB Element 5 4 6 10 Figure Q.4(a) [10 marks) The circuit in Figure Q4(61) shows a square wave current source connected in parallel with a capacitor with an initial capacitor voltage at time t - 0 of (0) - 1 V The timing and amplitude of one period of the square wave current i(t) is shown in Figure 2.4(52) Determine and sketch on separate graphs (graph paper not required) for 0