The circular access port in the side of a water standpipe has a diameter of \(0.6 \mathrm{~m}\) and is held in place by eight bolts evenly spaced around the circumference. If the standpipe diameter is \(7 \mathrm{~m}\) and the center of the port is located \(12 \mathrm{~m}\) below the free surface of the water, determine

(a) the total force on the port and

(b) the appropriate bolt diameter.