If the Appropriate Scheduling Equation for Task a of a Project

Short Answer

If the appropriate scheduling equation for task A of a project were W = D * U, and it was initialized so that W = 40d, D = 10d, and U = 4 resources, and task A is an effort-driven activity, correctly balance this equation if the value for U is changed from 4 to 5. To balance the equation, the altered variable and its new value are __________.