3. Using arithmetic shifting, perform the following operations assuming numbers are represented in two's complement representations. Indicate for each operation whether there is overflow or not with a justification. (a) (1 point) Multiply the value 0010101 by 8 (b) (1 point) Divide the value 10011001 by 4 4. Assume a floating-point representation on 14-bits including a sign bit, 5 bits for the exponent with a bias of 15, and a normalized significand on 8 bits (in the format 0.1xxx..., where the 0. is implied). (a) (1 point) Represent the number -20.25 in this format. (b) (1 point) Represent the number 0.15 in this format.