An agricultural sprinkler distributes water in a circular pattern of radius 70 m. It supplies water to a depth of e meters per hour at a distance of r meters from the sprinkler. (Do not substitute numerical values; use variables only.) (a) If 0 < Rs 70, what is the total amount of water supplied per hour to the region inside the circle of radius R centered at the sprinkler (in m per hour)? m per hour (b) Determine an expression for the average amount of water (in m) per hour per square meter supplied to the region inside the circle of radius R. m (per hour per square meter)