May someone please help me with my AP Calculus review questions because I'm confused on 8-11?

ax, x51 f ( x ) = 8.) Let bx2 +x+1, x>1 Find all possible values of @ and b such that f ( x) is differentiable at * =1. Show proper justification.lim [2( x+ 4x] +4]-(2x-+4) (C) (2x-+4+4x]-(2x-+4 ) Ax (D) Ax 10.) Let h(x) = f(x)xg(x). Find h (2). 6 Ay (A) -2 (-1,5) (B) 1 (C) 7 (D) -1 (3, 1) (6,3) What is 9' (3 ) ? (=8(x) (3,-1) (7,-4) Stop after! -6 (1,- 5 )