\text { Consider the function } f(\theta)=7 \cos ^{2} \theta+7 \sin \theta \text { (a) Find } f^{\prime}(\theta)= \text { (b) Determine the critical points of } f(\theta) \text {

on the interval } 0 \leq \theta \leq \pi / 2 \text { . If there is more than one answer, enter your values scparated by commas. } \theta= ^^20global^^20maximum^^20at^^20\theta=-----. ^^20global^^20minimum^^20at^^20\theta=-----. \text { (c) Determine the global extrema of } f(\theta) \text { on the interval } 0 \leq \theta \leq \pi / 2 \text { . If there is more than one answer, enter your values separated by commas. }