Select all valid function designs that meet the following specification and code quality guidelines: The calc_cost function should calculate and return the price of shipping of a package of a given weight in pounds. The rate for shipping is $0.95 per pound (lb) DOLLARS_PER_LB = .95 def calc_cost (weight: float) -> float: returns the cost of a package of given weight in lbs >>> calc_cost (5.2) 4.94 >>> calc_cost (7) 6.65 = price weight * DOLLARS_PER_LB print (price) DOLLARS_PER_LB = = .95 def calc_cost (weight): 77 returns the cost of a package of given weight in lbs >>> calc_cost (5.2) 4.94 >>> calc_cost (7) 6. 65 price weight * DOLLARS_PER_LB return price DOLLARS_PER_LB = .95 def calc_cost (weight: float) -> float: returns the cost of a package of given weight in lbs >>> calc_cost (5.2) 4. 94 >>> calc_cost (7) 6. 65 23 price weight * DOLLARS_PER_LB return price DOLLARS_PER_LB = .95 def calc_cost (weight): returns the cost of a package of given weight in lbs >>> calc_cost (5.2) 4. 94 >>> calc_cost (7) 6. 65 = price weight * DOLLARS_PER_LB return price DOLLARS_PER_LB = .95 def calc_cost (weight: float) -> float: returns the cost of a package of given weight in lbs >>> calc_cost (5.2) 4. 94 >>> calc_cost (7) 6. 65 price weight * DOLLARS_PER_LB return price