Alecto (Pilot Paper)

Dear sir, While using futures options in this qn, it says the exercise price is 4% and June futures rate as 3.98%, when the interest rate increases by 0.5% The answer to the qn should the option being exercise according to the revision kit says no, I worked out the gain to be (4%-3.98%)* 22mn*5/12 = 0.001833 mn My doubt is is this gain too negligible to even consider exercising this option? Or am I making a big deal about this? Thanks