(1 point) compute the surface integral over the given oriented surface: f=y8i+6j−xk, f=y8i+6j−xk, portion of the plane x+y+z=1x+y+z=1 in the octant x, y,z≥0,x, y,z≥0, downward-pointing normal ∬sf⋅ds=∬sf⋅ds=

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°