Q$2.$ A weir on a permeable foundation has a level floor of negligible thickness and is $10$ m long in the direction of flow. At the two ends of the floor $2\mathrm{.}5$ m deep $(\frac{u}{s})$ and $2\mathrm{.}20m(\frac{d}{s})$ piles are provided. Using Bligh's Creep theory, calculate the uplift pressure at the mid length of the floor and at quarter points. The effective head of water can be assumed to be $2$ m $.$

$(6)$