Complete the code to produce "blue wolf" as an output. class pencil:
color = 'yellow'
hardness = 2
class pencilCase:
def __init__(self, color, art):
self. color = color
self. art = art
def __str__(self):
return self. color + " " + self. art
# main program
pencilA = pencil()

print (caseA)

A. caseA = ('blue', 'wolf')
B. caseA. pencilCase('blue', 'wolf')
C. caseA = pencilCase('blue', 'wolf')
D. caseA = pencilCase(self, 'blue', 'wolf')

You need to design a circuit that implements the functions in the following table: s0 s1 function0 0 a + 10 1 a – b1 0 a + b1 1 a – 1s0 and s1 are 1-bit control inputs to select the function of the circuit. inputs a and b are 4-bitnumbers in 2s complement form. the output is also a 4-bit number in 2s complement form.you are allowed to use only one ttl 7483 4-bit adder to implement all the functions. but anynumber of other components (except the adder) can be used.hint: design a combinational logic circuit to modify the input b and the “carry input” of theadder depending on the control inputs s0 and s1.important: lab grade will depend on the working of the circuit & will be checked of by your labinstructor.1. is the output valid for the following input combinations: a. s0 = 0, s1 = 0, a = 7, b = 3? b. s0 = 0, s1 = 1, a = 7, b = 3? c. s0 = 1, s1 = 0, a = -4, b = -5? d. s0 = 1, s1 = 1, a = -8, b = 6? 2. what is the range of inputs (for both a and b) that will produce the valid output for all the functions?