(20 pts) Using wxMaxima expand (ax+2)4+(bx)7. Evaluate this expression using ev command with the appropriate option (i) for a=1,b=2,x=1/2. The output should be to obtain a rational number. (ii) for a=3/2,b=1,x=1. The output should be a floating point number. (30 pts) Using wxMaxima, define a function f such that f(x)=exsin(x) (i) Calculate f(1). (ii) Write dxdf+x1 without evaluating it. (iii) Evaluate part (ii) using ev command. (iv) Substitute the variable y for cos(x) in the output of part (iii) using a Maxima command