int Marks [20]= { 70, 85, 60, 55, 90, 100, 50 }; For the above code, answer the following questions i) Find the size of Marks array. ii) How many number of elements are present in Marks array ? Find the index value for last element in array iv) Find the index value for the element 60 v) Find the value of Mark [2] + Mark [O] in Marks array. b) A bar 450 mm long and 20 mm in diameter is elongated by 14.2 mm in length by an axial pull is of 110 KN. Calculate the value of stress, strain and modulus of elasticity of the bar