Starting with the Z-force equation, use the small-disturbance theory to determine the linearized force equation. Assume a steady-level flight for the reference flight conditions.

Are there options for this?

Because its reliable.   there is no pollution  the chances of a radiation leak is low

So since the snail is moving at 3.6  miles per hour you multiply by 5280 to change it into feet per hour. so you get 36*528 ft per hour. since there are 3600 seconds in an hour, you divide 36*528 by 3600. so simplifying we get 528/100 which is 5.28 ft per second

Answer is trees if this doesnt try using google