18. [-/4 Points] DETAILS LARCALC11 4.3.059. Find possible values of a and b that make the statement true. (a, b ) = ( 19. [-/4 Points] DETAILS LARCALC11 4.3.060. Find possible values of a and b that make the statement true. (a, b) = ( 20. [-/4 Points] DETAILS LARCALC11 4.3.075. Find the constants a and b that maximize the value of ( 1 - x 2 ) dx . (a, b) = ( Explain your reasoning. The function fis -Select- v between x = (smaller value) and x = (larger value). Submit