A rectangle has a length of (2.5 ± 0.2) m and a width of (1.5 ± 0.2) m. Calculate the area and the perimeter of the rectangle, and give the uncertainty in each value.

(a)Calculate the area and give its uncertainty. (Enter your answers in m2.)

(b)Calculate the perimeter of the rectangle and give its uncertainty. (Enter your answers in m.)