Plz answer as quickly as you can

For question 6 and 7, consider the following function: f (x)=cos(2-2x) 6. If the graph of y=f (x) is obtained by a few transformations from y=cosx , which of the following is correct? a. y=f (x) is obtained from y=cos x by a reflection in the y-axis, a horizontal compression by a factor of 7 and a translation of 1 unit to the right. b. y=f (x) is obtained from y=cos x by a reflection in the y-axis, a horizontal stretch by a factor of 2 and a translation of 2 unit to the right. c. y=f(x) is obtained from y=cosx a horizontal compression by a factor of NIH and a translation of 1 unit to the left. d. y=f(x) is obtained from y=cosx by a reflection in the y-axis, a horizontal stretch by a factor of 2 and a translation of 2 unit to the left. 7. The period of y=f(x) is (a) 2x ( b) 12 (c) 4 (d) 8. 2 JI 5 (a) 36 ( b) 720 (c) 144 (d) 1.256' 9. Find the minimum value of 3cos x-8 (a) 2 (b) -3 (c) -5 (d) -8 10. If OKxx , and sin x