Please help with practice questions 1, 2, and 3.

1.

Use the Squeeze Theorem to evaluate the limit. (Give your answer as a whole number.) lim (x, y)- (7,4) (x2 - 49) cos = (x - 7) -+ (1 - 4)2Find the limit. (Use symbolic notation and fractions where needed. Enter DNE if the limit does not exist.) _ sin ( 1 0x y) 11m = l | (x.y)>(0.0) ny Evaluate the limit for r(t) = (t , sin(t), -2). lim r(t + h) - r(t) = (f(t), 8(t), h(t) ) h-0 h (Use symbolic notation and fractions where needed.) f (t ) = g(t) = h (t ) =