Igor spent 30 minutes doing laundry and then washed pots and pans that each took 3 minutes to clean. What is the equation that can be used to find the value of y, the total time that Igor spent on chores, and what are the constraints on the values of x and y? a) y=30x+3; x is any integer greater than or equal to 0, and y is an integer greater than or equal to 30.

b) y=30x +3; x is any real number greater than or equal to 0, and y is any real number greater than or equal to 30.

c) y=3x+30; y is any integer greater than or equal to 0, and x is an integer greater than or equal to 30.

d) y=3x+30; x is any integer greater than or equal to 0, and y is an integer greater than or equal to 30.