Consider a closed rectangular box with a square base, as shown in the figure. Assume x is measured with an error of at most 0.4% and y is measured wit 0.40%, so we have dx Idyl 0.004 and 1 $0.004 of at most dvj a. Use a differential to estimate the relative error - in computing the box's volume V V las b. Use a differential to estimate the relative error in computing the box's surface area 5 lov a. (Type an integer or a decimal Round to two decimal places as needed) (as b