(b) Examine the four planar structures given in Figure 1 and find the degree of statical indeterminacy. Provide an equivalent statically determinate system for all cases. [10 marks] (c) Identify the unrestrained degrees of freedom for all structures in Figure 1 and state what the degree of kinematical indeterminacy is. [8 marks] D (0) ******* www. roller internal hinge www.c slider bar internal, IT hinge M Figure 1 (iv)