For this exercise, you'll use the rectangle class below (you can assume that the length and width are measured in feet).
write a class named carpet that has two data members: size and costpersqfoot. it should have a constructor that takes a rectangle object and a float as parameters and uses them to initialize its data members. it should also have a method named cost that asks the size data member for its area and uses that to calculate and return the cost of the carpet. this is an example of class composition because the carpet class contains a rectangle object as one of its data members.

class rectangle:
"""
represents a geometric rectangle
"""
def , length, width):
self. length = length
self. width = width
def area(self):
return self. length * self. width
def perimeter(self):
return 2 * self. length + 2 * self. width

Write a new lc-3 trap subroutine (i.e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i.e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e.g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e.g. b0000 0000 0000 0111 =