k) When the price of worms goes up from $1 to $2, the quantity of ketchup that Gollum consumes goes from 3 to 1. Calculate Gollum's cross-elasticity Eab for ketchup and worms using the arc formula. What type of relationship exists between ketchup and worms? How would you classify Gollum's Eab-elastic, inelastic or unitary elastic