Based on the graph, please find:

a$).$ f$($x$)<mtext></mtext><mn>0</mn>$

b$).$ f$\text{'}($x$)<mtext></mtext><mn>0</mn>$

c$).$ f$($x$)$ is decreasing

d$).$ f$\text{'}($x$)$ is decreasing

e$).$ slope of f$($x$)$ is positive

f$).$ slope of f$($x$)$ is increasing