Askateboarder is attempting to make a circular arc of radius r-11 m in a parking lot. the total mass of the skateboard and skateboarder is m1 = 88 kg. the coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is u0.63. im otheexpertta. com 50% part (a) what is the maximum speed, in meters per second, he can travel through the arc without slipping? grade summary deductions potential 0% 100% sino cotan atan) acotano s cosh)tanho coso submissions attempts remaining: 7 tano jt( acos) sinh) sin 4 5 6 % per attempt) detailed view cotnho 0 degrees o radians 0 submit hint i give up! hints: 0% deduction per hint. hints remaining: 4 feedback: 0% deduction per feedback. -δ 50% part (b) he speeds up very slightly and begins to slide. the coefficient of kinetic friction is μ,-0.19. what is the new magnitude of his radial acceleration in m/s?