Please answer the given equation from number 1 to 3. Please show your solution. Thank you!

Determine if the given function is continuous at the given value of . If the function is continuous, determine the limit as approaches nuous, determine the limit as x approaches c. (3 pts each) (1) f(x) = x2 3x 1; c =1 (2) f (x) - 2 5x3; c =1 (3) f(x) - 2x5 + 3x4 - 8x3 + x2 + 5x -9; c=-1