(2) (a) Give the computational representation of integer numbers a=231 and b=-1201342. (b) Write the normal form of 0.0000772 and -32.6 and give their computational representations. (3) (a) Convert the binary numbers (11001)2 and (101010)2 to decimal numbers. (b) Convert decimal numbers (73) 10 and (34) 10 to binary numbers. = uv u+v (4) When a lens is used to form an image of some object, the focal length f is equal to f where u is the distance from the object to the lens and v is the distance from the lens to the image. Suppose u and v are approximated as u* = 1 and v* = 2 and 8(u*) = 8(v*) = 0.1. Find (f*).