6. (a) Find the total mass and the center of mass for a system consisting of the 4 masses in the following table. (b) Where should you locate a new object with mass 12 so the new system has its center of mass at (3, 5)? 7. g = 12 when 9 = 1.3, and '9 and h are related by the formula 3 + tan(B) = 7h. Find g, 8. Find the integral, J- {#4113 9. Find the integral, fsec( 2 + 3x)dx 10. Evaluate the integral, J. x - (In( x))2dx 7x24x+4 x3+1 dx 1 l . Evaluate