f(x) = { -x+b if x<1 or 1 if x=1 or (-5/(x-b))-4 if x>1 and x doesnot equal b}

(a) For what value(s) ofbisfcontinuous at 1 ?

(b) For what value(s) ofbdoesfhave a removable discontinuity at 1 ?

(c) For what value(s) ofbdoesfhave an infinite discontinuity at 1 ?

(d) For what value(s) ofbdoesfhave a (finite) jump discontinuity at 1 ? Write your answer in interval notation.

I literally have no idea where to start. If someone could just atleast get me started it would be a huge help. Thanks.