3. magma viscosity 3a) calculate and plot the velocity profile through a 2 m-thick basaltic lava flow with a viscosity of 300 pa. s and density 275o kg m" descending a 2° slope. what is the shape of the profile? [20 pts] 3b) calculate the maximum velocity in the flow. do the same for a similar flow of rhyolite with a viscosity of 1o pa. s and density 25oo kg m*, and a lunar basalt from the sea of tranquility (moon, where g is 1.62 m so) having a viscosity 9 pa. s and density 300o kg m. for comparison, calculate your own walking velocity ( 4 miles/hour) in the same units. are these accurate estimates of lava flow rates? think of factors that might complicate the calculation. [30 pts] 2