1. Convert the following points in rectangular coordinates to polar coordinates: a. (1,-7) b. (-3,-4) c. (-6, 10) d. (16, 10) 2. Convert the following points in polar coordinates to rectangular coordinates: a. (1, 240) b. (4, 135) c. (-3,285) d. (10, 20) 3. Convert the following rectangular equations to polar form: a. y=5 b. (x-1) + y = 1 c. 5x + 4y = 2 4. Convert the following polar equations to rectangular form: a. r=-2 sec 8 b. 5 sin e c.r=sin 8+ cos @