Write a function, fp_bin(v), that determines the IEEE-754 tuple representation of any double-precision floating-point value, v. That is, given the variable v such that type(v) is float, it should return a tuple with three components, (s_sign, s_signif, v_exp) such that s_sign is a string representing the sign bit, encoded as either a ' ' or '-' character; s_signif is the significand, which should be a string of 54 bits having the form, x. xxx...x, where there are (at most) 53 x bits (0 or 1 values); v_exp is the value of the exponent and should be an integer.