Use Euler's Method with N = 4 to Approximate the Solution

Short Answer

Use Euler's method with n = 4 to approximate the solution f(t) to $y ^ { \prime }$ = t + y - 1, $y ( 0 ) = 2$ for $0 \leq t \leq 2$ . Estimate f(2).
Enter just a reduced fraction of form $\frac { a } { b }$ .