What is the heart rate (beats per minute) that differentiate…

What is the heart rate (beats per minute) that differentiates pulseless ventricular tachycardia from pulseless electrical activity? In other words, below this heart rate the rhythm is pulseless electrical activity and above this heart rate the rhythm is pulseless ventricular tachycardia.

Wassily Kandinsky is an artist famous for his abstract paint…

Wassily Kandinsky is an artist famous for his abstract paintings. He is trying to sell the following piece of art at an event in the Museum of Fine Arts and he is trying to get the most money out of this. He needs that event attendants are very involved in the auction. Which visual strategy could be used to maximize the final profits of this sale?