I need help with the questions

1. Find the equation of the tangent line at the given point. f(x) = e3x-*, (3,1) 2. The average typing speed NV (in words per minute) after / weeks of lessons is modeled by N = 95 1 + 8.5e-0.12t Find the rate at which the typing speed is changing when t = 5 weeks. 3. Students in a mathematics class were given an exam and then retested monthly with equivalent exams. The average score S (on a 100-point scale) for the class can be modeled by $ = 80 - 14(t + 1), 0