Given y ' = y cost, Ost s 1, y(0) =1 and N=5. Then using Euler's method, the approximation of the solution at t=0.4 ( use 4 digit rounding) Select one: O a. 1.2216 O b. 1.4352 O C. 1.4399 O d. 1.2145- 1 Let V= - 2 then the first norm of v equal 7 Select one: O True O FalseAn IVP ordinary differential equation is called well-posed if a small change in the data of the problem leads to only a small change in the solution. Select one: O True O False