please help me solve this problem by showing all steps and using compound interest tables

3. A local botanical society wants to ensure that the gardens in the town park are properly cared for. The group recently spent $100,000 to plant the gardens. The members want to set up a perceptual fund to provide $100,000 for future replanting of the gardens every 10 years. If interest rate is 5%, how much money would be needed to forever pay the cost of replanting? Calculate the effective interest rate for the interest period of 10 years. ( 10pts) Incompressible water flows through a horizontal pipe at a rate of 0.01m3. The pipe consists of two sections of diameters 0.1m and 0.05m with a smooth reducing section. The pressure difference between the two pipe sections is measured by a mercury manometer and sealed with oil. Neglecting frictional effects, determine the differential height of mercury (h) between the two pipe sections. water=1000m3kg;oil=800m3kg;mercury=13500m3kg;X1=0.1m;X2=0.03mg=9.8s2m