1. The problem statement, all variables and given/known data a=(t^2 + 1)i - j + tk Find da/dt I multiplied out the brackets so a= it^2 + i - j + tk then got as far as da/dt= 2it + 0 + 0 + ? a) is this right so far? b) how do i integrate tk with respect to t? Any help would be greatly appreciated.