$1.$ The Phong reflection describes the way a surface reflects the light as the sum of which types of reflection?

a$.$ Ambient and specular

b$.$ Ambient and diffuse

c$.$ Specular and Ambient

d$.$ Ambient, Diffuse and Specular

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$2.$ Which statements are NOT true about perspective projection?

a$.$ all rays are parallel and view volume is a box

b$.$ all rays converge at a single point

c$.$ includes $1-,2-,3-$point perspective projection

d$.$ Viewing volume is a truncated pyramid $($aka frustum$)$

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$3.$ Lambertian reflection model is a model for which type of reflection?

a$.$ Specular

b$.$ Diffuse

c$.$ Ambient

d$.$ Fragment

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$4.$ Which reason is NOT true for using triangles as the fundamental area primitives?

a$.$ They cannot break up other polygons

b$.$ They are guaranteed to be planar

c$.$ They have well$-$defined interior

d$.$ There are well$-$defined method for interpolating values at vertices over triangles

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$5.$ Which term in the formula causes the difference between Phong and Phong$-$Blinn lightning model?

a$.$ shininess

b$.$ half$-$way vector

c$.$ ambient

d$.$ diffuse

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